The design is weird by itself, I never felt the need to reinforce faster with Ostheer squads, it's actually the faction which, imo, needs it the least, and aside from rushing an Ostwind I can't see a big benefit in build time decrease at 5 CP
Also as an active ability it feels awkward. As a passive it would probably be op. I think it would work much better as a version of Osttruppen Reserves where you call in two Lmg Ostruppen to supplement your Grenadiers for 400 mp and 120 munitions
This avoids the issue of putting Osttruppen in too powerful commanders like Lightning War and new Festung support since you can't use them from the start
A passive, you mean like Soviet industry was providing more fuel at a decreased manpower rate?
I mean I guess that could work somewhat, you get a decreased resource rate of maybe either manpower or fuel and in return you get an Osttruppen squad every 5 or 10 minutes or something like that.
Lol imagine just flooding the field with Osttruppen.
Alternatively it could be just Osttruppen support weapons or something, as in an MG34/42, the GrW 34 mortar and Pak 40 AT gun being manned by Osttruppen instead which means they'd be cheaper but also act like glass cannons basically since they would evaporate if out of cover.
But in general I feel like just straight up replacing Relief Infantry with an Osttruppen squad would be the quickest and easiet, not to mention simplest route to go since it obvious will never work "as intended" so to speak and is instead better to just replace it rather than try to fix and rework it for an x amount of times like the Sturmtiger. That is in my opinion at least since the ability goes against the game's design and philosophy of unit preservation in the first place.