I haven't bought the expansion yet, but from all the second hand accounts I am seeing, I'm glad that I still have my $80. The real question is whether the game has been so borked that even the existing content I own (and I own it all except for the Cannith challenges) is still going to be worth playing.
Oh well, its summer in my part of the world, and I have plenty of yard work to do while the weather is nice.
Maybe the game will be unborked by the time fall comes. As always, the biggest step is for Turbine to realize that they borked the game. If that takes too long, the game may not be fixed until the snow flies.
As a Premium player, I can afford to be patient. I'd hate to be a VIP paying a sub and have to deal with this.