What? Are you serious? Uh... FF15 is nothing like Versus gameplay wise. You only control Noctis in 15 whereas there was full party control in Versus. You're welcome to your opinion but let's not sugar coat 15 for the mess of compromises and broken promises that it is.
It's nothing like Versus really was, but it's more like what was promised than what was shown of Versus.
Maybe it's my memory playing tricks on me, but I distinctly remember them mentioning how they wanted real time combat that looked like the CGI trailers and Advent Children, and the 2011 trailer definitely did not show that. Neither did Episode Duscae, aside from the very vague warp points.
It was only in the very brief E3 2013 gameplay that we had some of it in a very automated way, and then in the Platinum Demo we got a legit version of that in the adult Noctis fight.
I'm not even saying it's better than Versus, because I love the gameplay in Kingdom Hearts, and because of that I can't wait to see how FFVII Remake will play, but it's definitely closer to what was promised.
EDIT: And the party control is something I didn't really care about that much after the 2011 trailer. Prompto was the only one bringing something unique to the table, everyone else looked more like a lesser Noctis, so I wasn't too interested in controlling them. This sounds like I hate that trailer, and that couldn't be farther from the truth, but yeah. One thing in that trailer when it comes to gameplay that is still vastly superior to what we have today is magic. Instant and cool, none of that pokeball bullshit.