I doubt SE in it's fullest love Lightning. She is more of Toriyama's virtual "waifu" more than anything. Saw some interviews with some of the staff who worked on the FF13 games and they said that some of the posters were taken down and replaced with posters of Lightning so that "She could look down on them and give them inspiration and work hard.". I could tell by body language that they seriously wanted to rip it off the walls, throw it in a garbage drum, and light it on fire.
As for the costumes I just hope it can be used as a vanity item, should that option arise.