People are bemoaning that Koeman didn't pick our strongest available line up, but isn't that because he/we want to play our best team on Wednesday?
If he'd played our strongest 11 today and then gone out of the cup on Wednesday (due to lack of freshness, injury, etc) then the post match thread on Wednesday would be full of people slagging Koeman off for not resting players vs Man City.
Damned if he does, damned if he doesn't....?