A part of the shell sticks too far into the rest of the cave, resulting in a gap. Not really all that noticeable in-game, could probably wait until after DoD if need be.
TR_m3_OE_TG_SaltyBottle01, an activator used in the OE TG questline uses tr\m\tr_misc_bottle_b00.nif which doesn't exist, it should use tr\m\tr_misc_bottlet_b00.nif instead
There is a large gap in the ceiling of "Tur Julan, Servants' Hall", possibly caused by some in_moldcave_lroom4_03 pieces getting knocked around on accident.
Xerhet Hitai (TR_m4_TJ_Guardian) is currently equipped with a Cursed Daedric Greatsword (TR_m4_TJ_Dae_GS_Cursed) which is based on the deprecated Daedric Greatsword. When the player slays him talks to him again in Khalaan (TR_m4_TJ_Guardian_Kha) with his sword in their inventory, he would normally "lift the curse" by switching the blade for the now deprecated base version (T_Dae_Regular_GSword_01) As such his weapon should probably be changed to something else, and his related greeting in Khalaan be updated to give the correct uncursed version of his new weapon.