No means of preserving troops
I'm looking at preparing an army for some dragon hunting. Given their ability to one-shot entire formations in a single go, a cape with 50% fire resistance and high armor are an absolute must. So I'll just upgrade those militia members I've been keeping alive all game long with... oh, I can't. I don't have the trait for plate mail, I can't upgrade their non-armor equipment for more initiative to offset the plate mail even if I could get it, and hey my archers can't even get the cape. I can't retrain these existing high level units at all it seems, just throw them away and start all over with new, low-health units. Am I missing an upgrade option here, or is there really no point in working for long-term unit preservation since I'll need to dump them all anyway to use them in late-game monster hunting?