No, you are missing the point the fact that a unit cost 240mp life grens and then purposely designed to perform worst at the game progress is bad design. late game they just bleed man power and waste pop cap. Hence the gaurd spam you see everygame, this has nothing to do with call-ins and doesn't make sense
Soviets are best in game at MP bleed due to fighting largely static factions while possessing great arty. Soviets frequently don't tech, which is bonus MP for them.
Anyway, Cons only bleed lategame if you charge them at the enemy like a dunce, or are fighting insane OKW troops.
Instead of complaining about Cons you should be complaining about the Maxim and Penals.