Yes, if you play at home, you will get better ratings in defence and rebound. I'm not sure about the ENT. But i think it effects too. When i played crunch time at league, next 2-3 games i get less ratings in everything.
Enthusiasm effects the ratings. Your effort does not for the current game; a CT or a TIE will end up producing the same overall ratings. The easiest way of thinking of it as looking as those overall ratings as a snapshot of the team's basic effectiveness for a game, with the effort they put in causing an increase or decrease in actual performance.