I see your point here, but I like them anyway because they just feel better for bossfights compared to the original soundtrackHmm I think it varies by song for instance I don't like how nearly all of the bosses use the same theme during the otherworld tracks. Basically you can feel it was made for another game so while the tracks from otherworld are generally better they also don't fit the game as well so though they have done a fairly good job with fitting them it is still clear that it wasn't what was intended.