Akphi, Mannion has been "deemphasized" for the sake of OSU's offense. It's far more balanced than it's been for the last 2-3 years. Despite losing Brandin Cooks to last year's NFL draft (top CFB receiver taken in the draft by New Orleans), everyone meet Victor Bolden, OSU's "sensational" TE who at 6'7" towers over his competition along with 3 other OSU TE's that could conceivably start wherever they played. I've personally have never seen a 4 TE offense until last night, so it's not that Mannion lacks targets to throw at, the big change is due to OSU's improved rushing game this season, something that has been noticeably missing from OSU's offense for the last 2-3 years... and I mean that in an extreme sense. Just be careful not to give Mannion too much credit for amassing stats the way he's been doing in an "artificially enhanced" way for the past 2 seasons (without a rushing offense that would naturally provide him with more choices in terms of play selection.)
