This is often overlooked, while the Vanilla had quite World of Tanks level of mobility for tanks, this sudden change to super high realism is not exactly realistic either or even enjoyable.

Even if some tanks may behave as realistically as possible they should still be tweaked a bit due to the fact that redoplying a tank (not just sending it forward to get killed by the enemy reactionary tank) is very hard and tedious.
The way Veteran vehicles operate seems to be more realistic in terms of their performance, one can actually redeploy their tanks and not get them killed by 1 Anti Tank gun.

Another point is that there should be a higher chance of a tank being repaired, this is noticeable when trying to go off the meta 1 tank destroyer +50 arty pieces to a combined arms of infantry and tanks, 1 AT gun can destroy all your armour while 2 MG's will disperse all your troops, this is not helped by the fact that Tank will not prioritise their killers.
Things wouldn't be as frustrating if at least after you manage to overwhelm the enemy position with your last tank at least 2 out of your 4 lost tanks would be repairable.

Something to at least address the capabilities of AT guns against tanks compared to Tanks vs AT guns should be done.

In conclusion I would really love to see armoured pushes be effective or at least on par with the rocket arty + mass infantry and change from tank destroyers and light 20mm AFV's meta.