Just DL'd today, and I had an issue getting started with the quests this mod provides.
The Khajiit courier just wouldn't appear! I've been Listener for a long time already and have done the Bravil-Cheydinhal-route a few times over. I redid it right after starting my game for the first time with this mod enabled, just in case, and then went outside and waited for 7 days to see if the courier would show up. Nope. Nothing. I went to the Cheydinhal Sanctuary and found the courier just standing around, and when I talked to him there were no options for dialog. I went outside again and waited for another 7 days and still no show, so I just went ahead and talked to Arquen. She acted like I had already talked to the courier, so I started doing the quests.
Might be a bug, or I could have messed up the scripts by running around and talking to the courier before he talked to me or something. Anyway, it was easily workaroundable, I just hope this doesn't create any problems further on in the quests.

Besides that, the mod looks brilliant.
Spoiler I just finished with the Anvil Sanctuary and sent Ocheeva off on her merry way, and I'm so psyched! This seems great so far, and just the type of thing I've been looking for to wrap up all the loose ends left by the vanilla DB ending.

Great job with the interior in the "before" Anvil Sanctuary, the gloominess and mutilated bodies were very Dark Brotherhood-questy. So far this mod is well on it's way on to my list of must have-mods that I'll never play without ever again. :goodjob:
// EDIT: Ran into another bug just now.
Spoiler After sanctifying the Leyawiin Sanctuary, I went to speak to Arquen about a nre Speaker for the Sanctuary and opted to go find Scar-Tail. I did, he was there, I talked to him and he said he'd follow me to Greyland but when I started walking away he would't follow. I tried quick traveling, walking slower, reloading and retrying from before I spoke with him and nothing happened. He just wouldn't follow.
Could it have something to do with how I completed the Renegade Shadowscale quest earlier on? I never returned an Argonian heart to Teinaava after agreeing to spare Scar-Tail's life (I think I might have not found the dead Argonian I was supposed to take the heart from or something, but I can't remember accurately that far back...), but the quest was marked as completed when I killed him off during the Purification. I don't know if that has anything to do with this, but that's all I could come up with. I have no other mods affecting Scar-Tail, so that can't be it either.