7 man conscripts being unlocked by munitions doesn’t make sense thematically. Munitions is for weapons, manpower is for men.
If you want to encourage late game use of conscripts attach a global upgrade to them to teir 4.
Once T4 is unlocked, all cons can now reinforce up to 7 men globally and receive the reinforce cost reduction. Take away the rest of the changes and just leave it as one extra man and less reinforce cost.
It makes more sense to the player and is less impactful to overall balance while still being a buff to cons.
I never liked and still don’t like penal troops thematically and would like to see conscripts as the primary soviet infantry again as they were intended, but the current implementation of 7 man cons is just weird.
Making it a global, however, you'd need to find a way to lockout their upgrades unless you want to adjust those. 7 man Conscripts with PTRS and PPSh-41s is not going to be a fun time for the other side. The upgrade is not meant to compete with Doctrinal items, but give a choice.