In vanilla, the only vampires belonging to clan factions are ones from the clans' main lairs. TR should do the same thing - vampires of vanilla clans shouldn't belong to any factions, Orlukh faction should be present only in Anbarsud, and Baluath faction should be restricted to Malawius Camp, Khirakai and individual vampires who move/enable in Ald Balaal.
There are dedicated entrances that are supposed to be used on the sides of cantons (ex_vivec_ent_**) that fit a whole lot better than the tomb ones, yet AT still uses the latter for some reason
1. move https://en.uesp.net/wiki/Tamriel_Rebuilt:Coladia_Nelus'_Stalker from Galan Brandt to Permil Danconis and remove its rank lock. It's a simple escort quest and it's connected to an earlier task, so it makes more sense in the first half of the questline than the second
Many treasure chests used by int devs have static loot, or have pretty boring loot overall. There should be a few chests with randomized item types and value levels that can be placed.
This is a good opportunity to add in more TR-specific items without needing to be hand-placed.
Revise the existing parts and add missing ones. The idea is that all parts should be available even if you fail the Baluath questline, and that certain buffs and debuffs for different parts can compensate each other and create different combinations.
Grimdil (TR_m1_Grimdil) in Bal Gernak's Manor in Llothanis is missing some wares that he's meant to sell, as Yimanalor (TR_m1_Yimanalor) in the neighboring room owns most of the items on Grimdil's bookshelf and table. These include soul gems and enchanted items that Yimanalor can't sell, being an alchemist.
Also, there's also an egregious floating lantern on top of Grimdil's wardrobe.
I've come across a bunch of NPCs who have the useless Weakness to Corprus Disease spell, including the misnamed 'Corpus' one too. They could probably be deleted or swapped with more appropriate Destruction spells.