Volkbags being moved to the Sturmpioneer's building menu could be interesting. Personally I'd like to see everything shuffled around a bit to get rid of STGs and possibly lavanades entirely.
For example:
- Assault Packages in Feuersturm replaced with Panzerfusiliers.
- Sturmpioneers gain the Feuersturm flamethrower upgrade as a stock option.
- Repair boost moved from Panzershreck to minesweeper.
- Sturmpioneers can upgrade minesweepers even when upgraded with a flamethrower or panzershreck.
- Volksgrenadier flame grenades are replaced by the MP40 package's standard grenade.
- Volksgrenadier STGs replaced with MP40s. This upgrade also gives them a closing tool such as the smoke grenade or Sprint.
No more lavanade, but OKW still gets a garrison clearing tool. No more good at all ranges STG upgrade: Volksgrenadiers now transition to CQC in the late game, replacing Sturmpioneers. They are replaced in the long range role by Obersoldaten.
I feel like that would be too similar to other factions. Yet another engineer unit with a flamethrower. Putting it on the already powerful Sturms could be very OP as well. Just give the flame grenade to the Sturms and a regular grenade to Volks.