Suggestion for Enthusiasm:
As someone who has played basketball most of my life (up to college). I find the enthusiasm element a little too powerful.  When basketball teams play each other, they don't go out and take it easy to try and rest.  I can't remember ever having a coach say: "Guys, let's not play hard this game because our next game is really important, and we need to save ourselves to try and win it."  It doesn't seem realistic.
However, I do think it adds some more strategy to the game.  If I were changing it, I would first reduce t he effect of enthusiasm on the games.
I think the enthusiasm needs to be tied with winning.  As a player I can't see how I get more enthiastic after I get blown out by 40 points when my team TIEs.  I would say keep it the same, but add the element of winning or losing to influence how much the enthusiasm moves.  For instance if I TIE a game and win, my number moves just like it does today, but if I lose my game, it moves up half as much.  Same with CT.  If I win, My enthusiasm will move down less.
I don't know if this is perfect, but whatever is done, it needs to have a little less effect on the games outcome.
Just my .02 worth