Very interesting to know, thanks for the extra information!
And you're right about the outfit, it did kinda just stick around a little past it's welcome. Much like Archangel, who stayed in his Apocalypse costume long, long past the point it made any sense, both characters seemed locked into the costumes they were introduced in for some reason while everyone else was getting periodic redesigns.
I still love ninja Psylocke though, for all the reasons I said. She's one of those characters with huge potential that never quite breaks through into the top tier, but to me she is awesome. If I ever wrote an X-book, she'd be on it.