I know this will never happen, but I really miss the old BF days where there wasn't too much customization. Nowadays it feels like its more about the meta of what you equip your gun and vehicles with as opposed to just playing your role and working as a team.
I REALLY enjoyed how BC2 did it. There was a strong incentive NOT to add an acog or red dot to your gun and just use iron sights. Same with vehicles. The upgrade you choose for you vehicle was how YOU played it. BF4 ruined it by making it mandatory to have sabot + active protection.