I guess it's time

[Niwashi]

I watched as the story grew and became better and better, and more and more content was added in the 2.X era. I enjoyed playing nearly daily, defeating each iteration of primals and raids with my friends and having great times and creating good memories.
<snip>
and then I watched as... nothing had changed really, <snip> I found myself asking the question "Is this it?" more and more

If you'd indeed been enjoying the game so much before, I'm just left wondering why you would want it to have changed. Of course new content keeps coming out, but it's still the same game, so is going to remain the same types of content. Any drastic changes in its overall style would leave the new content feeling too out of place.

Maybe it was just me, ...

That's what it sounds like. What you're describing is simple burnout. You've been playing so much that the same things you used to enjoy start feeling like a chore instead.

MMOs try to keep players around for a really long time, because the developers make more money off them that way, but from a player's perspective, it's not really the best way to enjoy a game. Take a break and play something else for a while. Maybe after you've finished or tired of your next game or the one after, you could try coming back and see if you can enjoy this one again.

Or some people find just changing around what they're doing in a game helps to counter burnout. You could try starting a fresh new character where you could play the storyline again and get away from the repetitive grind of endgame for a while.

Playing more casually can help with burnout as well. In my case, I played nearly every day for the first several months the game was out. But once I started feeling too burned out by that, I dropped down to a much more casual schedule, playing on average maybe a couple days a week or so. (Sometimes it's more, sometimes less, but I don't keep up the several hours every day pattern for more than an occasional week or two at a time.) For me, that's been enough to halt the burnout problem for the most part. When I still get burned out anyway, I take a couple weeks off and then I can enjoy it again.

If you're more seriously burned out on the game, though, then you might need a significantly longer break before you can enjoy it again. Or you may simply have reached the point where you've played as much of this game as you enjoy and it's time to decide you're finished with it. Liking a game doesn't really mean you have to spend the rest of your life on it. I really like the original Final Fantasy game, for instance, and have played through it several times, but I'm not currently playing it. The last time I played it was several years ago. It's possible I might play it again one of these years, but if not, that's ok too. It's all right to have enjoyed something but be finished with it. Maybe you're finished with FFXIV. Some people are.