Uematsu was clueless on how to compose the music for 1.0. He stated in the interview that he was shown screenshots of the areas in the game, so he had to compose music based off images he was shown. To me with ARR's soundtrack, Soken was there to work alongside the development of the game, so he KNEW what Yoshi-P was planning and wanted the game to sound like. Still, I think Uematsu should be welcomed back to help with the soundtrack for ARR if there is needed help! More composers = better soundtrack, to me at least.