I believe Trooperman has addressed all of the points you brought up, InfoDroid. The suggestion of a fanfare of “Yoda’s Theme” when he arrives with the clones is an excellent one, but he probably wants to save the kind of a cue for the end of the film when Yoda saves Anakin and Obi-Wan from Dooku (remember there is no Yoda/Dooku duel in SotDS).

Your comparison of Yoda arriving with the clones to Han saving Luke in ANH is apt, but flawed. Lucas says this very thing in the DVD commentary, but the difference is everyone knew there was going to be a big clone battle at the end of the film. That was a huge advertising point of AotC. Solo shooting down Vader was totally unexpected, part of why it was so great.