Any chance the Breen prototype could get a (less-capable) cloak like the production version? Cloaks usually seem more conventional than special abilities, even if research is needed to use them.
although i like the idea for its realism. i have slight worries about balance, as you can just build the proto as your scout and leave it at that. and you could cloak the proto to not lose it.
maybe if its cloak cost energy per second to use, so you would have to risk losing it if u wanted to use the cloak to scout.