Killer Kross at least makes sense as a signing. Bigger guy that can work a bit, has some presence about him, and can cut a half decent promo. I have zero faith whatsoever in WWE developing him, but there's a logic to it.
I have no fukking idea what they think they're going to do with Thatcher, though. I personally think he could figure out the WWE style and make it work for him (if Gulak and Lorcan can do it, then so can he), but I guarantee Vince and company will think he's just a boring lump and stick him on Superstars or something. Hell, I'm not even sure he'll find his way in NXT given how much talent's down there at this point. Matches'll probably be excellent, though, and good for him getting a few years of decent pay out of all this, at least.
Note: We MUST see Bryan work both of these guys in 10+ minute matches before they're released/buried/taken off television.