Personally I am in no rush at all. I have let all accounts go to FTP except my main tank. With that being the case, there's nothing of interest just yet. I have plenty of things to do from previous xpacs. If this were a level increased xpac I would be thinking differently.
Did a little beta on my main, bumped 6 more toons up to NOS, now have to spend a week or two getting them up to 120 and maxing out the aa's. Not in a real hurry to hit the new stuff yet, still a lot of unfinished business in TOL.
I'm not in a big hurry to buy the expansion for 6+ accounts. Content wise it looks like it's pretty much more of the same stuff we've gotten for awhile. However, the Tradeskill Depot is the first feature in a long time that's made me think about getting it for at least one account before I even hit the new content.