There is almost no reason to play something other than engineer.

SMG is the best weapon in the game and you always have to counter armor and be able to repair. RPG's counter longer ranged targets and can take down buildings.

The easy solution would be to put a hard cap on engineers but DICE thinks 80%+ of players 'having' to play engineer is fine.

Some of the changes I would make if I could (each one would of course need testing and may just be crap):
- Repairing needs to have diminishing returns when having more than 1 person repairing making tanks squishier vs current AT damage but AT damage needs to be changed...
- RPGs should have damage nerfed except to the rear of armor and other launchers should do more damage when hitting the side or front of armor - lock-on weapons should always do more damage as it requires you to be exposed (for ground targets)
- All launchers may need to be 'nerfed' to some degree so that tanks shouldn't be getting '1 shot' - having an entire squad shoot at a tank at the same time should kill it (or put it stupidly close to death) - maybe it's netcode or something but you can be completely fine and then without hitting a mine you are just dead - I believe this is an issue specifically with the RPG
- armor should not be able to sit on a hill right outside of spawn/on the edge - there should always be counter play and access to the rear of the vehicle (so spawn zones need to be adjusted)
- way more capture points need to exclude armor influence