TR_m1_Selura has a pretty poor spell list, with only two damaging spells, and mostly spells like spelldrinker and drain restoration or destruction, or similar. Her spell list should be trimmed and filled with some more substantial combat spells so her killquest isn't hilarious.
To complete the Aimrah quest, you have to talk to Zadathys and the hetman before Ivon Seloth reveals his disease and goes to Serynthul. The problem is, the player may complete the quest by killing the hetman and taking the lighthouse key from her corpse, which locks the final part of the quest.
After discord discussion, a few more edits were made to the exterior of Nurstra's complex in SH, most importantly adding a secondary tower to the mesa.
The Vantus Mine Key, tr_m1_ito_fw_keyvantus01, which is given to you at the beginning of the quest "Miner Problems", is supposed to open the locked door to Vantus Mine: Packing Room, but it also opens the locked upstairs door in Firewatch, Vantus Manor, allowing you to access the bedroom and steal everything inside.
With all the beautiful new Dunmer (and other) armors that have made it into Data in recent years, it would be cool to integrate them into commonly-visited Mainland settlements in preparation for Grasping Fortunes - Especially the quintessentially Dunmer Guar Hide, Kagouti Hide and Alit Hide sets. These sets are also mostly absent from most merchants in Narsis and other GF settlements, as the Alit and Kagouti sets were added into data quite late in development, after most interiors were made. Smiths and merchants in obvious places like Old Ebonheart, Firewatch, Andothren etc.
The farmlands south of Hlaalu Ferry and Kuriki should have dialogue about the Bandits in Kuriki problem. This quest was completed prior to NPCing of that area, so the farmers, the primary victims of these bandits, have no lines under the "bandits in Kuriki" topic. This isn't a huge priority, but if the player decides to go to the farms south of the cave, they might find it odd that the farmers have nothing to say about the bandits.