Your definition would include yaoi in the definition of slash, and yet one of the frustrations I've experienced in this whole discussion is that yaoi has pretty much either been not considered, or has been dismissed as those silly little fangirls are the real homophobes, don't look at us slashers.

I think it's worth considering how you want to deal with yaoi, whether you want it to be included or you want to look at it separately.