Spotting is better now. Heavy tanks have better view range, but Light tanks are fast enough to find people the Heavy tanks can't see yet, and work as excellent artillery hunters and, if they catch them off-guard, can easily kill just about anything without a decent turret. And sometimes tanks that just have slow turrets, like the KV. Tanks will SOMETIMES vanish from plain view, but it's not as bad as the beta. If they do, it's because it's a stealthy tank, with a high crew camouflage skill, and camo netting.