I agree - those guys wouldn't sit in AAA or the bullpen.
But - we don't actually need to sign anyone right now, so it doesn't make sense to me to trade something of value for Morales. Right now, he'd be a moderate upgrade over Duke as the long relief guy in the pen.
If Gio gets suspended, then maybe you look to sign Vasquez or someone like that. I wouldn't trade a top prospect just on the chance that Gio might get suspended.