I'd say heavy weapons. Though compared to BF1 it does more damage against vehicles.
But the main problems I have:
No auto lock-on.
Almost no noticeable splash damage against infantry. Almost meaning: remember in BF1 when a rocket would strike the ground, even if the infantry wasn't killed, at least they were thrown back. Now it seems they take damage, but keep moving and acting like they were hit with pistol fire.
2nd to that I'd say snipers. Though they all have two zooms, there's no reticule without zoom. Plus, the reticule seems less accurate than BF1.