SWTOR failed for many reasons. To sit here and list them would take quiet a while. SE I think has a good idea on why it tanked so badly. If they don't, then we are in deep trouble.

That said I want to point out 1 thing about FFXIV currently that turns me off from the game. It's a little too Tedious. For example; the grand company quest's. Instead of being able to just look up the information online, talking to npcs, or doing a few quest to get an idea of who I want to join. I'm forced to do a series of quest for all 3 which boil down to "go to this faraway zone to talk to one person and have one easy battle." It's just too tedious. Often I find myself accepting a new quest, seeing where it is on the map, and then saying to myself "I'll do this tomorrow." This isn't exactly fun, its just tedious.