Mysterious: Evil or Good.
hmmmmm. If you are looking for unsolved mystery: http://wiki.guildwars2.com/wiki/Wizard%27s_Tower
Nobody knows who build this, who is living there, how it is floating, what the origin is, etc. The only thing we do know is that it is old. Older then gw1.
As for the living story, I think there is a lot of long term story and plotting involves round the living story. specially the buildup from the molten alliance to the reveal off scarlet was very interesting. However it is time to wrap that line up and start a new one. she is revealed, so please let us finish that.
Arise, opressed of Tyria!
As for the floating tower this is cool, but we cannot go there so it has no use for us, what i mean is mabey a town like LA, not as big ofc, but in this town there might be a vendor with new armor or somthing like that, a Town that has use for players just something new to explore and a start for a new story, mabey even a lead into some more parts of the Original map, Crystal desert, or the jungle.
Not just something prity to look at