This and this.
"What will their commanders have now, then?" is just the start.
Well, that is not a problem. Back in 2013 ostheer commanders had almost no useful abilities and it seemed much healthier than it is now. Commanders that change army too drasticly are hard to ballance and often create a narrow meta.
Of course if these tanks are ever going to be non-doc they need quite a nerfing to them. Just like soviet early game. It's a long way that nobody is probably going to go, but from design perspective it is well possible.