How to Fix Battlefield
The game right now is a weird, poorly-made mix of Battlefield and Call of Duty, which sucks and won't help the game keep a good player count once the new CoD releases. Here's how I think we can make the game feel like a proper Battlefield experience—like Battlefield 1—instead of CoD gameplay.
1. Movement
The player shouldn't be able to jump-shot and cancel slides movement should be like in Battlefield 4. This would force players to use cover and buildings, making fights look good and grounded like in Battlefield 1 instead of some CoD nonsense.
2. Weapon & Operator Builds
Weapon balance and operator builds aren't fun. Nobody wants to play against people with recoilless one-tap guns. Weapons should have a progression system where each level unlocks a new version with fixed equipment that works with different playstyles—close quarters or long range. It should also take less XP to level these guns so people can play multiple weapons instead of the same four overpowered builds.
3. Team Play
Squads should get an HP boost when playing together to encourage and reward teamwork.
4. Gunfight Suppression
Suppression should be heavier and have more effect on the player to make LMGs actually useful.
5. Vehicle Balance
Vehicle health should be increased to make them a real threat unless well-prepared. Give them more range and power, especially for the tank, to counter lock-on missiles. Planes and helicopters should get heavy buffs since they're useless right now. Give fewer vehicles overall—like in Battlefield 1—to balance them out.
6. Map Design
Make the maps longer and larger. This is Battlefield, not Call of Duty. Build them with control points that force the full team to play together on one big frontline, with smaller groups on smaller sub-lines like in Battlefield 1. This gives back that "war feeling" and keeps most players focused on the same large objective. For example, the map Passchendaele in Battlefield 1 forces players to advance in waves together.
7. Visual Clarity & UI
Please stop with the giant battlepass pop-ups. They only make players hate the game more and more. This is not how you sell anything. Clean up the UI clutter and let players enjoy the game without constant notifications and flashy overlays interrupting gameplay.
—I'm not a dev, I probably forgot tones of things . Feel free to add any ideas in the comments."

How to Fix Battlefield 6 : Uninstall

I agree with bringing back gunfight suppression.
The top priority should be the netcode.
I don't care about movement "jump-shot,etc." but the weapons are so easy to use that even if you play badly, you can still kill anyone. That's not normal.

"Planes and helicopters should get heavy buffs since they're useless right now."
I play on some real sweaty Australian servers and planes, little birds and attack choppers are very strong right now offensively and have a significant effect on maps like Mirak.
But overall your other points are pretty good.

make heavy warheads work for the panthera. It's been broken for months.

Movement is way too fast and overly unrealistic. You have all this great military simulation type stuff but then you have this stupid fortnite movement that ruins it.
Also the controls on aircraft should be a lot more simple so anyone can get in and use them easily.

1) Bunny hoping and SMG shooting with full a accuracy is the worse. I haven't seen sheet like that since Dolphin Diving in BF2.
▶Watch on YouTube
2) Weapon attachemes are cool but some op one like thermal vision should have some draw back or higher weight / cost.
3) HP Boost for Squads is a stupid idea. It would only empower well coordinated squads and your random squad on public servers would sill be useless. Game needs more coordination tools for squads and better rewarding system for teamwork and for following squad leader orders. Squad Leader should be able to mark targets more easily during gameplay, on map and on map on spawn screen.
Predefined voice chatter radio should have more options. Don't think you can even call backup when you need it in Conquest.
4) Remove stupid info how many people are at capture point. This shouldn't be visible, because as soon as you cross the capture point border everyone knows you're there with our even looking around. And they see how many forces are counter-attacking the point.
5) Reduce TTK and remove vechicle's auto-repair. Even self-repairing in BF1 required player's action and could be interrupted by enemy players. Current system is poinless, it's desinged for 'hyper active' kids and promotes lone wolf playstyle.
There are so many problems with this game, I don't think they can get it right, at least not right enough to be a good Battlefield game.

Movement is way too fast and overly unrealistic. You have all this great military simulation type stuff but then you have this stupid fortnite movement that ruins it.
Also the controls on aircraft should be a lot more simple so anyone can get in and use them easily.
This confuses me a little bit.
Asks for infantry gameplay to feel more like a mil-sim.
Then asks for Aircraft to be easier to pilot...
Also BF4 had way jankier movement. Todays sweaterbase would have no problem learning how to zuzu and muzu... which litterally from someone elses pov looks like teleportation.
Which yeah would be like swap 1 evil for another one.

1.)Remove Slide-jumping. And increase the penalty for shooting while sliding or jumping. It's pathetic to watch, it literally feels like im playing CoD.
2.)With no weapon balance, everyone uses the same weapon. And nothing else gets used.
I dont think they should have fixed attachments, customizing in bf6 is actually pretty good.
Also it doesn't take long to unlock attachments worth using. Also plenty of hardware double XP tokens are available. Double XP weekends etc.
3.) No, Thats an unfair advantage. Majority of players in any given lobby have 0-2 flag caps.
Im constantly top 5 of team, and my squad isn't even on the leaderboard when you press tab. People who play the game shouldn't be penalized by their useless team mates theyre put with.
4.)Yes suppression should be better, id rather suppression affect you visially, perhaps a heavy blurr affect like HLL. It shouldn't affect your aim though. Im sick of this bloom mechanic they have in BF
5.) Imo, vehicles are a real threat. Especialy after their recent buff. Even Jeeps take 2 rockets to kill which is absurd.
50,cal decimates infantry and does severe damage to aircraft. Tanks who rush points are usually the ones that get taken out quick. Tank play should be cautious and slow otherwise you have planes, choppers tanks and RPG's firing at you all at once.
Also REMOVE the damn disabled function when you get severly damaged. It takes away any ability to recover and fight back. It's pathetic they even added it to this battlefield.
6.)larger maps are fun, meat grinders and bottlenecks are not.
IF were talking conquest, then no this is terrible idea. Maps stagnate and become boring.
7.)I actually miss the ribbon popups. But yes the battlepass ones are overly intrusive and loud on the screen.

100% Agreed with the movement part in particular. Enough of this Apex Legends / Overwatch ♥♥♥♥. It was supposed to be the "grand return of battlefield" and we're left with this ADHD-engineered crap.
Special mention for the constant respawn of enemies BEHIND YOUR OWN LINES. Like in Call of Duty. You permanently have to look behind you and objective progression means nothing on the map.

How to Fix Battlefield 6 : Uninstall
thats nice idea man