The maker of Battlefield 4 has posted another long account of what it is doing to fix problems in the game. "We are working on fixing glitches in your immediate interactions with the game world: the way you move and shoot, the feedback when you're hit, and the way other players' actions are shown on your screen."
At this point most of the work they've fix most of the stability issues.
Most of the problems I have with the game are related to gameplay balance regarding weapons, vehicles and game modes (like how broken Rush is on certain maps).
Obviously they shouldn't stop trying to improve how the game runs, but it is miles better than the broken mess it was at launch.