it seems like kiner did most if not all of s1/2 soundtracks by himself, but for 3 and 4 they hired like… 2 more composers. (if anyone has corroborating info that would be sick) but that would definitely explain a lot of things. increase in different themes, different instrumentations - lots more percussion, for example, and strings, less horns though
Nope. Kevin has always had additional composers working with him, even as far back as Clone Wars season 1.
Matthew St. Laurent (All the way through mid season 1 Clone Wars to season 4 Rebels)
Takeshi Furukawa (All the way though mid season 1 Clone Wars to the show’s end)
Russ Howard III (Worked on a few season 2 Clone Wars episodes)
David Glen Russell (Joined on The Zillo Beast Strikes Back and continued through Rebels to the new Clone Wars episodes in production)
Reuven Herman (Worked on Clone Wars from season 4 to the show’s end and Rebels partway through season 3 to the show’s end)
Jared Forman (Worked on Rebels seasons 1-3)
The Kiner Brothers (Kevin’s sons); Sean & Dean Kiner (Sean started on Rebels season 2 while Dean joined with Twilight of the Apprentice. Both worked through to the the show’s end)
This is all backed up by my research in to the music of both The Clone Wars & Rebels, which I have collected into two detailed spreadsheets on the scores:
The Clone Wars
Rebels















