Why are we all doubting mCe? The man has proven himself to be a good coach.
He first started his gig with Gen.G, and they actually looked marginally competitive under him.
And let's remember what he did with The Guard; he transformed a young team into one of NA's best. They went from Open Quals to winning Challengers and going to their first-ever LAN, all in 4 months. Despite stage 2 being a misstep in the meta, they nearly qualified for Champions.
You can't deny that mCe can't transform C9 into a powerhouse like he did with The Guard; not only that, he worked with leaf, vanity, and xeppaa so he knows how they work.