I'll voice my support for the OP by criticizing this post.
The problem with all of those activities is that they're not really 'end-game'.
Gathering / crafting / leveling other jobs? No. That's not end-game, that's hitting the reset button. All you're doing is repeating the same grinds you already went through once, without as many quests to help boost the XP.
PvP? Seriously? This game has about the most half-arsed PvP system of any MMO I've ever seen. If that's considered end-game, there's a problem.
Which leaves us with raiding, which, as the OP pointed out, is a relatively limited set of experiences. I'll expand upon the assessment, actually; raids (and dungeons) in FFXIV are shallow, short, boring gear-checks that (occasionally) gate (very short-lived) gear upgrades. Entertaining end-game activity this is not.
FFXIV desperately needs real, actual end-game content. Palace of the Dead was a good start, and Hunts could have been as well with more effort spent on design. Both activities have a lot of meat to them, while not feeling like atrociously long-winded grinds.
The problem, of course, is that like all other content in FFXIV, they're likely going to be rendered obsolete. End-game content that doesn't provide useful gear isn't worth much, especially when the grind remains to discourage people from Glamour-farming.
TL; DR: I returned to XIV recently after a couple of years removed, mostly because I want to immerse myself in the game again leading up to Stormblood, and also because I'm bored and in-between games at the moment. That said, every time I read posts defending SE's end-game incompetence or advertising XIV's limited content, I realize that my return is almost sure to be short-lived. There's too many people accepting (and even praising) half-arsed attempts at end-game, and too few demanding the wealth of experiences offered by other MMOs, including XIV's own predecessor.
The OP's suggestion, while oft-repeated, is a good one.