Disagree, one of the best and most immersive features of ths game are its diverse looks. They should go even farther:
Tanks with sandbags, tanks with scratches and bullet holes,
soldiers with or without helmets, backpacks, coats or no coats, bandaids whatsoever. There should be an editor in which you can customize the appearance of your vehicles and squads (like in rocket league)
Relic missed a BIG opportunity there and could have maintained their reputation easily. I'm pretty sure people would have paid a lot of money for stuff like that
In MP games units must be easily recognisable. This was even one of Relics design mantras for the infantry and they should follow suit with vehicles as well.
The problem is here the basic shapes are far too similar.
for the 4v4 people, the biggest playerbase, the aesthetics would be very important, ask rosbone or a.soldier.
Also if you lose a game, it's surely not because you need half a second more to see what tank is on the screen at one moment a game