I don't know. I'm currently finishing up the very first Final Fantasy (on PSP) and after that, whatever XV provides is going to be better than barely anything at all.
There's something to be said for those old NES JRPGs... you couldn't see far into the horizon... "Exploration" served a very different purpose in those games. You didn't have a quest marker telling you where to go, you had to EXPLORE to find what you are supposed to do next... perhaps an NPC will tell you to "head West", but that's as much as you would normally get. And exploring the open landscape to find your goal was often quite hazardous! Go the wrong way, you could end up dead in a single random encounter.
I'm not saying that's how I want all modern JRPGs to be... but as far as "Storytelling" is concerned, it is hardly the same medium.
The original Final Fantasy is almost like a modern-day "Metroidvania"... You get a new "ability" (canoe, boat, airship) which grants you access to new areas, and you must find your next goal in those new areas. FF1 was also suprisingly open in the order you could kill 3/4 of the Fiends. You need to kill the Earth one first, but you could take the rest out in any order you wish, IIRC.