During the Almas Thirr Mage's Guild quest to get a velk soul, Tynachos really should acknowledge you killing Hlanas (with taunt/frenzy to not immediately provoke everyone). Even just a token "Well, that saves me the trouble of expelling him." line
The load doors for the Cabin and Hold of the Niben Wind in Old Ebonheart are swapped so that the cabin is at the front of the ship. The cabin interior has windows which are located on the back of the ship in the exterior.
One of the planters had three Spiked Rice plant containers. That's not some beautiful flower or precious fruit, that's just some grain. I replaced them with Morrowind flowers.
Small bug - ran into Shanath Teran on the road, he asked for help tracking smugglers, I declined to ally with him on account that he articulates himself as having sold his self and sword for coin over scruples.
Later I checked back with him as I'd found two smugglers but the topic "pair of smugglers" then goes in a loop with all 3 response options causing him to repeat his initial dialogue, and the player unable to leave the window.
The quest Lighthouse Keeper's Hospitality (TR_m4_T_Lighthouse) in Teyn can't complete upon Erethys' death. Couldn't find anything in his script or elsewhere to trigger Jounral TR_m4_T_Lighthouse 100 to finish the quest.
Another note: His GetDistance check on the player should be increased slighly. You can get close enough to interact with him to get the greeting choices, after he attacks he forcegreets the same choice message again.