Let me say this. I love the PT scores.

I think they are excellent pieces of work, and as music goes I would put them up there with Williams work on the OT and his other iconic film work.

I think they are much maligned because there were fewer great moments in the PT for us to assosiate with the music, as well as lots of reuse of musical themes lessening the impact of fine peices ("Duel of the Fates" is a masterpiece, and having it during Anakin's "Easy Rider" moment in AOTC and the Palpy/Yoda cartoon show in ROTS was simply awful). The music is also on an intentionally grander scale, because the films themselves are a grander scale than the OT.

That being said, Adywan adding "Battle of the Heroes" in ANH carried with it emotional resonance because of the purpose of that piece of music (Anakin vs. Obi). But even if Adywan hadn't repeatedly stated there would be no PT music in ESB:R, I still can't think of any point that a PT theme could be added into ESB that would add to the film.