The original Xbox was a fine console who cares if it didn't really have one particular genre of games? It still had a lot of good games on it.
I would agree though PS4 kicks XBone's ass in terms of good exclusives. Hell the Wii U probably does too even though Nintendo is already abandoning it.
JRPGs aside the original xbox had a small library of good games regardless of genre. Its by far one of my smallest game collections and that including 7 copies of KoToR I and II combined.
Low FPS hasn't stopped developers or publishers for the last decade or more, why stop now ?
more and more people are getting used to higher framerates in the various forms of entertainment and thus it's becoming less and less acceptable to do so?