Fair enough; they coulda gone with Jimmy Page or Steve Jones, but they probably wanted it to be a yank (I'm sure there's a few other candidates but can't think of them just now).
I guess it isn't Slash so much as it's Guns 'n Roses. Axl Rose is what I think of. I realize he is probably far better than I give him credit for, but I find him hard to listen to. If the lead singer isn't someone I like, it's hard for me to listen to any band. Needless to say, I was never able to listen to Guns 'n Roses much (because of Axl Rose mostly.) The point is if Slash had been in another band my impression of him would probably be different.