As far as XIV is concerned though, a significant amount of the draw and appeal of the game is based around how hard it Member Berries all the rest of the FF series in different ways either in references or set piece fights that calls back to previous titles. The entire post-release storyline additions to the last expansion is heavily drawn from FFIV, and current expansion Dawntrail looks like it's also pulling a lot from FFIX while the raid series is a direct reference to FFXI. This is to say nothing about all the other little references throughout the rest of the game that are either just small nods, thematic similarities, particular enemies, etc.
You should try it.

They have a pretty generous free trial, and it's not like the game is hard. They removed all the difficulty because the game sells better to retards if there's no need to think or learn.