Just gonna be another voice pining it in but typically those who story skip don't skip around as a result of the "end game" content being more limited than other games as a result of the game focusing on it's story telling and lack of retentive mechanics meant to keep the player playing a result of compulsion.
FFXIV's more of an RPG than MMO, an RPGMMO. And if you do skip to the end game you may just get bored and quit all together after wasting the money on the skip. Your mindset should be more akin to a single player game than that of a multiplayer game, whenever I recommend it to friends I aim to hear their thoughts and experiences, but not partake in them through the game.