Why did I abandon this game it’s insane

I just reinstalled because mw4 beta ended and I was missing the week 1 movement, and holy shit this game is the best call of duty i have played. I barely remembered it existed I think I played season one and then abandoned it for some reason. The movement is so easy to do and it’s fast paced and I am just running and gunning. This is the only cod that plays how the trailer looks. Why did they abandon Omni movement and dive shooting?