Found various interior northmarker errors throughout Hlan Oek, I've compiled a list here to not clog the bugtracker. The interiors that I found are:
Hlan Oek, Vuvil Adas: Master-at-Arms Hlan Oek, Docks Warehouse Hlan Oek, Tiralos Uval: Smith Hlan Oek, Lodyna Garer: Pawnbroker (this one isn't so bad but it's a few degrees off) Hlan Oek, Guard Tower South Hlan Oek, Drissa Vendil's House Hlan Oek, Estoril's House Hlan Oek, Larienna Strabo's House Hlan Oek, Council Company Tradehouse
I just completed Paruddma's Maw. Incredible work, really, I really enjoyed the whole quest in Aimrah (first time I've played that one) and the dungeon itself.
I think there could be just a couple additions at some points of the related quests
Tynachos directed me to Aimrah with "The Creature in the Lake's Soul" quest, the locals there informed me about the local priest looking for his friend.
Entering Deep Waters while water walking is on placed my character directly on top of the black sphere. You can even find two dummy keys from there.
Once I got out of the pocket realm the desk was floating a bit over the water level, only the legs were touching the water. Also the cephalopod were kinda levitating since they didn't have enough water to swim in, I guess.