Why would you not want something to be instanced, particularly on the first day it is released? If it wasn't you'd have to sit there camping whatever objective you want to get done. Content gets flooded on patch days and the weekend that follows. Having some major content, like a dungeon, be open world just isn't part of the mmo model anymore and likely won't be (and shouldn't be) for 2.0. This is of course assuming they intend something like the tower to be some sort of important end game content.

Open world content needs to be just that--open. Dynamic and accessible to all on patch day is another prereq to it too. I know many have their strong "pro-FF" mentality, but you really must think critically about the implementation of future content. No one likes to have their exp camp jacked for example and that kinda conflict only occurs in open world. If that was end game, we'd have the same issues experienced in RoZ expansion.