Hi Salk (late reply), thank you for your ideas and suggestion. They do make sense. LotSC is closed content wise, though. I did close holes etc. in the past, but the changes you suggest change the appearance imho (and would take a lot of testing etc., for which I don't have the time.)
As far as I recall, one of the basic ideas was that the mod leaves an accessible house with trunks, at least I read this somewhere. :-)
The door under the stairs: in IWD it is plot related, although it leads no where (not trying to spoil, although I guess most people reading here did play IWD).
EDIT: Concerning the uncommented code: I don't remember, I probably replaced it with newer weidu function code and left it in. I won't touch the tp2 though, as long as it is working!
The axe tutu-only: this could be fixed, but I'd probably just remove it, not make it available for the other games. I'd add it to the "known issues" list but won't really bother. As AstroBryGuy said, it's just an ordinary axe, and maybe not even put there on purpose but a left over from the area.