Generally, I think it's mainly due to the upgraded armour qualities on the tanks with the latest version, tho' it's no doubt the tank city greatly upped tank usage even more.
Frankly, I'm very pleased to see that the mainstay of GV assaults have gradually shifted to tanks, rather than the Ostwinds

Now, when compared from before, massive tank assaults to the field are as deadly and fearful as massive plane attacks, and the balance between ground forces and air battles sometimes have had decisive effects on many battles
It's cool to watch GV assault colums these days

Seeing hoardes of Panzers march within the vicinity of an airfield is awesome!
While still some strange things in GV damage modelling, I'd say the GV changes in recent versions was a big success!