Originally posted by cdtmOwen said that once his insanity returned he would become "unreliable", but I think it's clear that he was still very much in control of his powers. Aside from that, he also displayed a degree of omniscience, as he continuously prophesized events before they happened... From within his limbo realm.
Owen did, in fact, tell Doom he'd be "useless" once his insanity returned. After their little history lesson in New Avengers.That'z the reason he went to Doom in the first place. He's so crazy, he can't even think enough to reality warp himself a fraggin burger. 😉
'insane' is a relative term, after all. 😉