TBF Final Fantasy can only be sub-subscribed to WOW Classic TBC Gold. It's all fine if you buy the ESO sub. Except for the poor expansions, but they're also less expensive than FF expansions and released twice as frequently so when you double the size of them at the same cost, it's pretty competetive.
FFXIV is also an extremely acclaimed expansion in the form of Shadowbringers which is listed as one of the top Final Fantasy stories of the over the last 15 years or so. This is the highest praise I've ever heard of an ESO story.
It's done! I've finished the first part and enjoyed each and every moment of it. I'm not feeling the need to rush , as Ilevel sync can be a challenge to complete old content. The possibility of having other alternatives to buy WOW TBC Classic Gold murdering hoboing it up, like racing chocobo which is wonderful. My companions who have done Dungeons with me will not give up after wiping, and will happily assist you in case you need help.