All these extra dice just completely change the game. Large battles are gonna mess up the Soviets because they can’t really afford a “combined arms” thing.
The whole benefit should be one of movement: 2 movers paired with 1 movers in NCM at 1:1 basis should all move two.
Combat should be toned down to this: 1 air, 1 armor, 1 Inf/Art/Mech gets one re-roll if missed. Don’t add more dice, just take the dice you got and possible re-roll.
However, the movement won’t change the game too much, like this 3 or less thing.
Besides, that idea was submitted by Larry Harris like 3 years ago and people shot it down then too. He considered it before AAP40 came out.