It strikes me as odd that the Hellknights would abandon the Citadel and not take care of the Sepulcher and other interred bodies. The attention they gave to them (burying them with a +1 weapon or an item of personal significance, setting up the undead guardians, etc.) seems inconsistent with just abandoning the whole thing without doing something with/about them when they moved. Alak more or less just shrugging at robbing the graves is also a bit off.
The undead, at least, are needed to scare of Voz, and it does seem time to give the players a few magic items, but the setup troubles me. Does anyone have any thoughts on this?