It didn't appeal to me at first either, but the content updates are usually worth it. I noticed both FFXI and WoW have this. Like mini-expansions, but you're forced to get 'em. I dunno, whatever floats your boat.
GW is a good MMO, especially considering it has no monthly fee. Very different feel compared to traditional MMOs, too. I highly recommend it.
Well, like someone said back on page 2, 3, or 4, FFXIII and FFXIV are really two completely different kinds of games. I'd figure they're not even being developed by the same teams, with a few exceptions (Uematsu?). I could be wrong on that, though.
Einhander II would be pretty cool, but FF is Square-Enix's bread and butter, and they definitely know it.