Omegahugger
Inattentive Idiot
While I am voting for it because I am a shameless Qrech fanboy, there is an argument to be made that ignoring the local Skaven population entirely and assuming that they won't be a problem is not a good idea.I don't see how visiting Qrech's old home provides anything other than saying we did so and satisfying our excessive curiosity just because there's a chance to do so that won't be available later. It's also both a completely unnecessary risk and doesn't provide anything to anyone else, on the expedition or off (other than maybe bringing Qrech a little doodad from the souvenir shop).
We don't know what Moulder is up to (or if they are even still there), and if they are planning something like, say, mounting a giant expedition to claim the semi-abandoned Karak Dum, I would rather know it than not.
Plus, the Lord of Change went in their general direction and if those two factions meet it can result in nothing that isn't both great and terrible.