I doubt their goals (when achieved) will fix the main issues of the game. They'd have to add substantially more and change a lot of things that are already set in stone. Mass Effect 3 "only" had an ending with many issues and Bioware wasn't able to fix that either; they weren't even close but I do welcome their commitment (both Square Enix and Bioware).
Considering that, I don't agree with calling FF15 an early access title. The game won't fundamentally change; a few added tidbits here and there would make the game a bit more enjoyable and bearable but that's it. Square Enix let us pay full price for (edit: a) polished game with flaws, flaws like any other game has.







