What's so bad about the X68k version of Ys? The non-anime styled art? That actually looks decent to me. At least it's different than the bajillion other ports of Ys.
As for hentai Valis...personally, I don't really care since I never was much of a Valis fan, but I can understand fans feeling some outrage at this. That has nothing to do with the hentai aspect (I'm libertarian and do not care if you want to view porn/hentai), but rather as Emerald Rocker explained, taking a franchise and shitting on it by completely debasing it.