Whether or not FFXIV changes trajectory, it will be long dead by 2034. Assuming that the entire genre doesn't collapse in on itself sometime between now and then, this is how I think the fate of FFXIV will play out:

I have my doubts that WoW will continue to release expansions after The Last Titan, their supposed Endwalker, probably entering maintenance mode around late 2028. With them out of the picture, the time would be right for a newcomer MMORPG to fill the massive hole in the market WoW would leave behind.

Assuming that FFXIV doesn't add a non-paid MSQ skip (they won't), the massive entry time sink turning away new players would only worsen, and assuming that FFXIV doesn't course correct their dev philosophy (they won't), they will eventually begin to bleed their long-time active players... especially if 8.0 comes and goes with no noticeable change in the formula.

I'm betting that XIV will either shut down or enter maintenance mode by 9.3.