I've really enjoyed FFXV. It was certainly better than XIII, but I think I like it a little better than X, even. The closest analogy I can think of is that it is to XIII in my mind what XII was compated to X, in that XII and XV were the FF games I really wanted from their respective generations. I'm glad it's doing well, especially if the rumors of a XIV helmed by Hiroyuki Ito turn out to be true.
And like Catherine says, I like the main characters even though it would have been cool to have a woman or two available as permanent party members. Square Enix really nailed down the chemisty between Noct, Gladio, Ignis, and Prompto. My favorite is Ignis.
I don't think the "real Versus XIII" will ever come out. I believe Square Enix has distanced itself from the Fabula Nova Crystallis concept for good, after two sequels to XIII and then FF Type-0 (which was a good game in its own right). It wasn't especiallly well received.