Mic-Nificent
I didn't eat nobody
Spencer has already received a lot of critical acclaim actually. People dug Morning Glories (I never read it), the opening arc he wrote of Thief Of Thieves was crack, Bedlam is crack and he did his thing with T.H.U.N.D.E.R. Agents at DC. His Secret Avengers is supposedly pretty solid as well but I don't read stuff that features fake Nick Fury a lot (exception is Cornell's Wolverine because it's Cornell).
His stuff at other companies has been critically acclaimed but none of his Marvel stuff has been praised very much. I've read most of the stuff he's done at Marvel and it's mostly been mediocre.