It's counterintuative for this game, you're encouraged to save your units for their experience but this ability is the other way around, please send 12 of your guys to die so you can get 2 squads of Osttruppen, like, why?
You're encouraged to keep
squads alive. The ability goes by model count, so it's really just encouraging you to be aggressive, not necessarily suicidal.
The reward should just be a little better, and maybe it should be available earlier. The deployed Ostruppen should come with some equipment that regular Ostruppen don't have, similar to OPs 3rd suggestion