2. Incorporate a blobbing penalty (like 1,25 or 1,5 received accuracy modifier if units are too close together) - pretty much the same as 1
3. Tone down M1919 a bit or make it more expensive
4. Calliope...
5. Bofors & mortar pit: the brace ability... seriously...
6. Make conscripts scale better into the late game (weapon upgrades such as DP LMG, PPSh or this:

as a non-doctrinal upgrade, buff vet 2/3)
7. Delay quick Luchs a bit, IMO it comes a bit too quick - not so important