Gotta say I'm digging it. I've played through this game a zillion times, and while it is possibly my favorite nostalgia-tinted JRPG ever, it's nice to have it be a lil' different.
My main complaint as of right now is that it's too "true" to the original in regards to camera angle and level layouts. If they were going to bother modeling all the old shit into 3d, why not do a bit of expanding and redesigning? Similarly, why emulate the OG battle camera angle rather than going for something FF& inspired, which the DS should have been able to handle. Heck, even a 3/4ths perspective.
I'm digging the additional difficulty, but so far it's really not so difficult. It just seems like an enemy in each area has drunk some badass sauce since the last port of the game.