You say facts ... but those are just presumptions both ...
1) Lenore built a way for her automaton to kill her.
Lenore build a "kill" phrase to her automatron ... that is all fact we know.
To say that she implemented it to "kill her" is just another theory.
And i feel the urge to mention that nothing in game that i have seen supports this theory. :-/
2) She had the exact ingredients in her lab to brew Omeluum's potion.
There is many other mushrooms in her tower ... and not just mushrooms, but also flowers, crystals, sussur tree and lots and lots alchemical equipent ... Lenore was quite obviously experimenting with those things ... but we dont even know if she was brewing Omeluum's potion ... nor if she even knew about the posibility.
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As far as i know, her notes from the tower just mentioned some really important research ... we have no idea what was that about.
If i had to gues, it would be about Sussur flowers, since they (as it seems) dont just "drain" magic from their surroundings, but also keep it (like a batery) ... based on the fact that once we insert the flower to that machine, whole tower starts working ... and there was "empty" sussur flowers laying all over the place ...
Maybe her research had nothing to do with tadpole or Mind Flayers ... maybe she was simply researching possibilities of sussur flower uses.
I dare to say such research would still have incredible value for cleric of Mystra.
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About her death ...
I know we dont know what race Lenore was ... only that she was quite obviously shorter than anything we can curently play.
(I never managed to get there as Halfling ... since i really dont like that race
please tell me what it told you if you did)
I would just like to point out that IF Lenore was Gnome ... there is "halfeaten" gnome corpse around Hooked Horror location ... not so far from the grave Lenore was wisiting ...
I would just like to point out that it is entirely possible that she either never made it to Baldur's Gate, or even worse, has ben killed after she returned.
So shouldn't Bernard be shorter if Lenore is shorter?
If I were a gnome, i would make a tall robot too, so he could fetch me things from the top shelf.
