I'm considering it a bug until relic says its intended.
I don't want to talk about balance with bugs being part of it as it gives unclear perspective.
Anyway, we'll see how it'll turn out, up until now OKW had no problems what so ever with repairing armor quickly, might have been because of previous working bonus, might have been because of lesser armor presence.
I m pretty sure it is intended..
there ya go
http://www.coh2.org/topic/45338/sturmpioneer-repair-speed