The Wanderer's Palace bug is kind of a big deal. It looks like at least a level 40-ish dungeon so hopefully they get that fixed soon before many people get to that point.
Because its in the known issues section I'd imagine it will get fixed fairly quickly especially like you said its an integral part of the lvling/gear situation in that lvl range, not to mention its still on the duty finder and they mention not to enter on it. Like people are going to read all the update notes XD. My guess is it will be fixed by official launch or a day or two after/before it.