I have to ask the Gods of Istaria this: Do you really think that making Lairshaping so much of a miserable grind such a "Good Thing"?
Why, oh Gods of Istaria, do you think that building a "home" should be such a complicated and grinding such an affair?
First off, you made lair planning such a complicated affair that it gives even the most inveterate architcect a blinding migraine, with the irregular shapes and reversing connection points.
Then you made positively sure that only the most anal-retentive players could gain Lairshaping levels by (a) prohibiting experience for making your newly-made "intermediate" construction units (like cast stones), and (b) devoting only 20% to actually making the lair construction units while devoting 80% to actually applying them.
I'm beginning to think that your inspiration for this awful system was the Marquis de Sade;