Well I decided to pop onto the PTS tonight to do a bit of testing (and c'mon, there's a chance to get the shroud thingy and a manticore mount) and I have to admit it's looking not too shabby. I forced myself to do nothing more than the opening area and the PQ's and they are quite fun. Yes there's bugs (reported) and some feedback needing done (written and submitted) but I think LotD will be a lot of fun and a good way to pass the time over the summer months while the game settles itself back down and the classes become balanced.
My only real concern is that I fear it will drive a lot out of the regular tier four zones and into one dustbowl making the whole area fairly laggy, but we'll see.
Overall though, it's looking good from my little excursion.