FFXIV was under development for what, 5 years? Keep in mind the original game still had crystal tools, which means it would have run terribly as it did prior to 1.0's shut down. The servers would still be in Japan, which means we'd be dealing with latency on top of the piece of garbage crystal tools was.
We would still have no auto-attack (knowing that SWTOR pulled off a sans-auto-attack combat system tells me it would have worked if people had been a little more open-minded), and the class=>job dynamic would most likely have been similar to what The Secret World did with Decks. We'd still have the copy-paste maps (which means southern thanalan and the black shrowd would still be corridors). I doubt stats would have had much weight since by design it seemed that everyone could wear everything. The only plus to Tanaka's FFXIV is that we'd still have Coerthas as a scottish highlands type place instead of snowy mountains like we have in ARR.
Your mileage will vary. You ask the mob and the mob doesn't know what it wants. Ask me what I want one-to-one and I can give you a clear answer. Hell, my sig has not one, but several clear answers. :OWhat is true is that Tanaka almost never listened to the player base, but on certain aspects that is not a bad thing, as the players never really know what they want.