HotRod said:

Don't me wrong, he still comes up with wonderful themes (duel of the fates, across the stars, flag parade, droid army,a couple from Sith) it's the in between stuff is where I think he's lost it!!

Agreed.

I think there was also just more testosterone behind the original SW scores- there is an aggression and energy there that is not present in the prequel scores (although I think Episode 1 definitely captured that energy again in large part. Expectations were huge for Episode 1).

Everybody ages and not everybody can be at 100% all the time. I still enjoy JW's music and I think that he is motivated by good material, it's just that he hasn't had many truly great movies to score lately.