I saw today's Jimquisition and in a way it makes sense(I'm not sure if I agree with how he puts things though). If you try to do too much at once, you usually can't do anything well. Example, before FF13 versus was finished despite being announced at the same time as FF13, we've got FF13-2 that's coming out.
So how does this apply to FF14?
Creating an MMO is a different beast than making a normal game, and Squenix should have remembered that from FF11. You can't approach it the same way and you need to make sure it has more support. So if you combine this theory (doing too much) with the theory that Squenix didn't know what they wanted to do when they made FF14, and you've got two things which mesh well to the current situation. I mean how can you make a proper MMO if you don't devote the right amount of attention to it because doing too much and you treat it as a normal game and you don't really know what you want to do with it besides making an MMO and end up reinventing the wheel.
Perhaps the best thing for Squenix to do in the future is to make fewer games, like not making 2 spinoffs and a sequel of one of their titles at once, especially considering while that title might have sold well, it wasn't a good game overall.
EDIT: For clarity's sake, I'm saying that it was Squenix itself that was overly ambitious in wanting to make too many titles, not the design of the game.