Going by the sample rooms above, (27, 21, 24, 28, 27) words multiplied by 4000 rooms divided by 350–450 words per page yields 200–300 pages indeed. But if it's mainly exposition and not interactable I can see how it would become dull reading quickly.
It is boring, there’s minimal interactivity. Quite a long way from the better text adventures out there.
Yes, but "Quantity has a quality all its own". Maybe a massive enough environment can be interesting despite being static.
(This led me down a rabbit hole trying to find a source for that quote. It seems to be mostly, and falsely, attributed to Stalin.)
Not sure what the length has to do with handcraftedness though. This comment is handcrafted even if it is short.