OpenMW possibly makes Viccia Hitaria not float properly for the MG quest, but instead makes her hover slightly over the ground. In Viccia Hitaria's Home in Bal Oyra, MG quest "Head in the Clouds".
tr_m3_dro'jorr and tr_m3_ji'morashu-ri are both Nobles, but there is no custom "my trade" entry which applies to them other than the vanilla non-Great House fallback line, which is written as though the speaker is an Imperial.
In fact, it looks like there are no "my trade" entries for anyone in Ebon Tower, Elsweyr Mission, unlike the Valenwood and Summerset Isles missions. This was probably just an oversight.
As part of the quest, Free at Last? you need to escort the Khajiit slave, Shamiir, out of Harru Cavern and back to the guards at Erethan Plantation.
However, Harru Cavern (Mephalan Vales, 33 -7) has been placed in such a way to Shamiir cannot leave the area immediately outside the entrance. The steep cliffs prevent him from following the player back to Erethan Plantation.
I have a strong feeling linked doors to Mournhold interior in exterior cell Almalexia, Mournhold could cause standard intervention to misbehave short-circuiting it so oftentimes player may land in Mournhold interior instead of some expected exterior, there is a reason why Bethesda implemented transport to Mournhold as dialog scripting command instead of a standard transport link
The dock extension where Sentius Veros stands is built with furn_de_rope_03, a vanilla rope mesh which lacks collision. This means you can fall off the dock after exiting the boat, before completing chargen or unlocking the controls. Since you can't jump, pick up items, cast spells, or open your inventory at that point in chargen, there is effectively no way to get back onto the docks.
To fix this, someone just needs to add a couple more of the invisible CharGen walls to Seyda Neen.
