Thats the necessary reciprocation in order to keep them aligned.
I don't think any kind of "reciprocation" is needed. Soviets are gonna get hit hardest by the call-in change I want, because they're the most reliant on the couple of cheese call-in tank strats they have. Wehr second hardest, but they actually have good tech vehicles in T3 so they've always had an option that isn't just waiting for Tigers. USF and OKW won't really care except for the EZ8 spam strat and even there the cost of a major is not as high as soviet tech and gives you some utility in the form of the retreat point.
The horrible conscript scalability into lategame has largely been "solved" by nobody using them in team games if they want to win, and nobody expecting to win without either really heavy support weapon (maxim, mortar, sniper) or tons of anti-infantry tanks. It's not like I'm suggesting to give them some kind of weapons of mass destruction here, even with these upgrades they couldn't win against an lmg gren squad at any range all other things being equal. But atleast they'd put up a better fight than right now where they're literally just cannonfodder for merging into other squads in the end game.