I'm not sure why ppl think the content is meant to last untill next patch.
Clearly they don't expect you to stick around?
Almost every content release is announced or predectable so you sub when theres a content you want to do...is the design of this game.
If you don't care about EX farm,treasure maps,Ultimate,beast tribe,PVP, you don't need to sub this patch or sub for a month and do everything while you're subbed.
Only FOMO in xiv rn is PVP rewards and you should be able to get it all in a month.
I agree that if we could get exploration content earlier that'll be great but if its gonna cost the quality of it or other content I rather wait.
If there were more gear grinds like super rare drops or upgrades like in other mmos I would've love it,but that'll introduce problem that those mmos have and xiv hasn't.