In the OT, Williams wrote character themes (much in the vein of Prokovief's Peter and the Wolf) where everyone and almost everything had it own theme, so when the moment came to remember something or to underscore the emotion, the music theme cued you in the weight of the moment.
Now for the PT, it seems to me that Lucas urged Williams to only write generic action adventure riffs rather than themes to define a character (which I'm sure we all agree, the characters coulda used help in being more defined!) And instead of at least three new major themes written for each film like in the OT, now only one or two major themes were written per PT movie (Anakin's theme, Duel of the Fates - Across the Stars - Battle of the Heroes). Everything else is either little motifs (Battle Droid March, Gen Greivous) or innocuous action cues.
That one PT cue in particular... the "rousing" action cue used during:
-The Pod Race when Anakin's pod gets stuck with Selbula's...
-When Yoda comes to the rescue with the Clone Troopers in the Arena...
-When Greivous's ship starts falling back to Coursant making Anakin, Obi-Wan & Palpatine slide in the elevator shaft...
is SO overused it drives me mad!
Reprising musical material on the musical stage or on film is meant to reflect on an established idea, character or emotion. Case in point, the aborted end credit track in CLONES on the OST, at the very end, a beautiful sorrowful solo horn plays a quote of Anakin's theme, showing us that the good person who was Anakin was slipping away. But Lucas didn't think we needed that! He lazily tracks previous cues because he can't stop his last minute fiddling. Cues, which have nothing to do with the content of what's on screen, are used just because it's an "rousing action piece".
I wonder if he keeps changes his clothes over and over again just before he goes out...?