The second disc of Xenogears is well, its obviously different and feels rushed because of a lack of interaction. Whenever I replay the game, I never really want the first disc to end, because I know the game is pretty close to being over. If the story and characters weren't just SO damn good, I might've been pissed at disc two. But I was just so in love with the game I didn't care.
I dream that someday Square will go back and create a directors cut, redo the 2nd disc and release the game. Too bad most of the staff from the game has moved on.