Average Q is the whole Team, including the bench. It can be misleading! You need to look at the 11 that will be on the pitch, if they have 11 Scouts with a handfull of 1 and 2 star subs, the number can be VERY misleading.

No, the highest Q Team does not always win. Formation and your orders are important too, and sometimes one or two players can be the whole difference in the match, if they have a great game, you can lose even if you have everything set for the best. Or if an important player has a bad match..