Jheja-Ri has an unique Background response that says that he doesn't speak much Tamrielic, but outside of his unique Greeting 0, he defaults to generic Hlan Oek greetings that are written in standard English/Tamrielic. It would make sense to give him an unique Greeting 5 that would fit him better and take precedence over the generic ones.
Duvlas' dialogue entries for the topic crazy half-naked Dunmer that are now filtered to TR_m3_q_Kassad_QuestionedNumber >= 3 should instead be filtered to >= 4, so it's consistent with Duvlas' script that triggers the force greeting. Currently, the player can access the dialogue that's needed to progress the quest before the force greeting is triggered, which is confusing.
TR_m4_q_Varzan is made to follow the player using AiFollowCell, Player, "Raloran Ancestral Tomb", 0, 0, 0, 0, 0 in My Dear Friend Arven. The entrance of that tomb is at 0,0,0 meaning that the package is completed instantly upon entering. The command should be replaced with AiFollow.
The Baluath questline was expected to be merged into the Mainland, not LA section file. Therefore, the following should be applied after LA section file is merged into the Mainland:
Remove duplicate double doors in Ngelfltingth, leave the ones with 70 lock and the key Remove duplicate Firolen Ervanys in Ald Erfoud
When you rescue Estoril in TR_m7_HO_HouseForSale quest, she should leave the closet in her house (either with AiTravel or with PositionCell on cell change).
UPD: apparently, AiTravel already exists in the script, but is overlapped by a "return" above.
TR_m7_q_maphix_ovimus and TR_m7_Mirasa Rurvyn stand in the same place in "Hlan Oek, Morning Sun Cornerclub". One of them should be moved, probably to the top floor.
The faceless Indoril Helmet that's used in The Face Stealer quest should probably have the script TR_m3_TT_FS_helm_scr attached to it. Currently, the check to weaken the Face Stealer if you have the helmet equipped doesn't work.
Not sure if this is supposed to be a Data or Mainland bug - the helmet is added by Data, but the script is added by Mainland.
