As stable as bf 3 is, I can't go back to it, hated it (only really enjoyed CQ + AM maps), bf 4 is much better overall imo aside from net code, battlelog and stability:
- better designed maps, more cover from aircraft
- game runs considerably smoother/better for me
- no stupid dull lifeless filter on top that made the game incredibly ugly
- much better UI
- aircraft isn't as much of a problem
- love the vehicle timed limited ammo system + prefer tank gameplay in bf 4
- all the guns feel well balanced i.e. no one good weapon that everyone uses like they did in bf 3 e.g. m416, m16, aek
- so good how people who PTO get rewarded far more than the people camp just to get cheap easy kills, seen people with 5 kills come top where as people who have 15+ kills and don't PTO or do any team work are around the middle of the scoreboard