Honestly, the only thing I can find objectively wrong with the soundtrack in-context of the HD remaster is the difference in quality going from _____ to the battle theme and victory fanfare back to _____. It literally sounds a console generation apart - the new battle theme, while fine on its own, is extremely jarring in how its washed in unnecessary reverb with questionable (for 2013) sample libraries for half the instruments. If the entire soundtrack had been done that way in a pseudo-MOD-esque format it would have totally been fine, but as it is it does detract from my experience when it repeatedly transitions to/from the refurbished area themes.
Besaid was one of my favorite tracks in the original game especially considering where it's placed in the experience and how it helped set expectations for the game/console generation, but it's not like the new version completely ruins the game. If anything it does evoke a much more tranquil mood, reminiscent of Wakka's abhorrence for dem makinas.
If you're cancelling your preorder over a couple of tracks, I really don't know what to tell you. Your loss. It's not like the original OST ceases to exist. The original composers (sans Uematsu) were back to update their own works. I loved the old ones, and I continue to subjectively enjoy their craft, so I'm not going to be a jackass and let what -I- think suits a game best override what they think suits a game best.
edit: all that being said I'll reiterate that not having the original OST in there as an option is a really bizarre choice. I mean everything from Cave Story to Half Minute Hero have that option.
