Split Mech into 2 techs like Battlegroup (albeit with the side tech being much cheaper than the main tech this time). Yes I know this sounds like USF but whatever. Unlock the Luchs without upgrade so the Luchs timing can be fixed. The Stuka and Puma should be locked behind the side tech.
As for Volks, rework their veterancy and have the StG upgrade only use up 1 weapon slot, which allows them to salvage weapons from the field, fitting the faction theme. Remove upgradeable StGs outside of friendly territory.
