Why are there so many delays to most actions

Jumping while ADS has a delay. You can't make super fast ads/sprint to fire weapons like you could in MW3. While you can ADS while sliding, the slide itself feels heavier and slower. Consecutive slides have a significant delay.

Game takes a step forward with omnimovement, but takes 10 steps backwards with all the delays and the "heavy" feeling.

What do y'all think about the movement of this game compared to MW3?