It isn't the same role at all. Last season, the focus was on working the left channel and him moving into the box to score or assist with headers. Blind-Young-Fellaini is how it went most games. This season, he's playing as a proper CM initiating moves, staying deep to pass the ball and sometimes even being the deepest CM protecting the back 4. He does go on and try to get at the end of things at times but it's rare. With Young out of the team, we don't even have a dedicated man who tries to get crosses in for him to attack.He's still playing the same role. Starting in midfield and breaking forward from there. The only difference is he hasn't hit the form of last season. Not sure how that excuses Schneideelin being incompetent with and without the ball.
Re Schneiderlin, as I said in my first post, his performance simply be excused because of his partner but when you have to cover for someone like Fellaini, it doesn't help at all. If schneiderlin is playing as the holding mid, having someone who's good with the ball whom he can pass it to would help. If he's playing b2b, having someone who's secure defensively would help too. Hell, just having someone mobile to partner him who'd just do his own share of the work would be a step forward.