Glad you're enjoying things so far.Right, first things first: I definitely love the mod (in fact it motivated me to install ToB!) Brilliant work!
Well, for the bugs (sorry, but you asked for it ), there seem to be sort of connections between the areas now, i. e. the dialog with the green-black mage who cursed Jaheira started while the party was still in the building, talking to this cowled guy. Later there appeared a monster in the Temple District.
When I met Degardan for the second time, instead of commenting on his spell Edwin started a banter with Korgan; I had to enforce the usual dialog.
At the moment I'm trying to go on to Chapter 4, but Edwin keeps talking about "important business" every time I try to do the dialog with Aran Linvail, though I went through tho whole Nether-Scroll-Thing and there is no other quest in sight.
Regarding bugs - do you have a save game before those area related things happen, or just before Degardan's appearance?
The 'important business' isn't a bug though, Edwin just doesn't want you to leave Athkatla before his second quest is done with. How far have you progressed in the romance dialogues? Ideally, Edwin should refuse to leave once he has received a certain letter from a certain somebody, and until that quest is done with. I suppose it could be that programming makes him say it earlier though.