UNCORROBORATED SPECULATION TIME! Few things strike me as odd:
Ostwind was good enough before the patch to warrant choosing it instead of another PzIV quite often. Now it's cheaper. A bit worried there, but I suppose it's part of the new meta where Soviet has better medium armour on the field.
Su76 seems to be much more expensive for rather slight changes. Did you ever go "OHSHIII HE'S GOT ANOTHER SU76 I'M SCREWED MAN I WISH THIS THING COST MORE"? Me neither. Maybe the AoE profiles are in fact that good against infantry now.
Still not sure on late game viability of Soviet t3 without callins, but overall armour changes are just too extensive to judge without playing.
Panthers might still reign supreme in team games. Increased fuel costs will definitely limit its 1v1 availability, but in team games, what with trololopel blitz and fuel caches, the reduced MP cost might actually make them MORE spammable. And they will be better versus infantry (if you sink 175 fuel into a unit you will have no problems shelling out the 50 ammo for the mg42)
Oh and artillery changes just make me raise my eyebrow. Howitzers were annoying at times but they cost a lot of MP and are too easily destroyed with certain doctrines, and too difficult to destroy with others. We will be seeing even less of those, I fear.
HOWEVER
previously, vehicles incorrectly used deceleration to define the rate at which they accelerated, resulting in near instant max speed.
This small "change" is INSANELY important, deceleration is ALWAYS much higher than accel. Tanks should be considerably more sluggish.