Carrick at cb with buttner is a worry. Normally I'd say Fletch/Fellaini could give good cover but Fletch has undoubtedly looked slow in the matches he's played, if Fellaini pushes up as he has done then it could be a worry as if they run at us then they could easily get in.
I personally don't see why Young has come back in to it but in all honesty I guess it doesn't matter what we do in the league anymore, fourth is not happenning and I'm not fussed by getting europa. I'm sure Welbeck is beign rested, though I'd assume he won't play Januzaj against City, so unless he's injured then its a shame he hasn't started.