otherwise teching is close enough, and hard to pin down after you account for reinforcement, bigger squad sizes.
no not really... reinforcement costs are almost always half the cost of the squad... model per model comparison is really irrelevant when you consider that infantry are balanced per squad not per model... squads with lower model count tend to have lower RA and higher DPS... the same is true vice versa...
doctrine calls in,
the soviets have some of the best callins true... but again core armies must be balanced against each other... a faction should not be reliant on doctrines for viability
sov are pretty much king of late games dig-in.
mostly thanks to 7 man zis3 su-85 and ram+offmaps... and all of them got nerfs