Here's my part on the Celes beating thing.
I agree with Acula. It did make the scene much better, it also alluded to RachelxLocke, which a lot of the CelesxLocke relationship mirrors. When Rachel died, she was under lock and key with the empire, so who knows how they killed her, for all Locke may have known they could have beat her to death, so when seeing Celes (Who locke says reminds him of Rachel in the Opera scene thing) he went out in full on hero mode more than he did with Terra. With Terra he was all ">=O EMPIRE SCUM RAAAWR" and had to be talked down, with Celes he was like "MUST SAVE NOW!". In movies, and.. hell even in this game, you could tell that there is an immediate connection between the two (or atleast Locke to Celes and first, and then both later). Insta-love as I like to call it.
I think the fact that Celes and being beaten and Locke saving her did strengthen the love story aspect of CelesxLocke and even RachelxLocke, and I don't know about most people, but Locke's character development and story over all (love part included) is my FAVORITE story in the game.