Playing devil's advocate, I think there are a couple of different elements that come into play. The first issue is how
DVC initially THOUGHT the treehouses would be regarded. The treehouses clearly have their pros and cons. To many the bunk beds are a negative. The presence of only two bathrooms could be a negative (vs other newer resorts with 3 baths.) Other issues include remote location, limited parking, awkward bus transportation, etc.
I'm sure occupancy played a role in DVC's decision to price them the same as other 2Bs, but I'm not convinced that was the entire basis for their pricing. All of these point determinations are a best-guess to a large extent and DVC opted to price them the same as other 2Bs.
If demand for the treehouses is significantly higher than Two Bedroom villas at SSR they probably could increase the nightly costs for that room class. Other units would have to go down so there is a silver lining. But an increase in the cost of 60 treehouses isn't going to have much of a positive impact on the hundreds of other units at the resorts.
That said, there are other situations where such changes would be clearly warranted today. The most obvious is the Preferred BoardWalk View vs. Preferred Garden/Pool view at BWV. Costs have always been the same but the BW view is undeniably more sought-after by members.
If DVC reallocates in the next couple of years to increase the cost of the BW View units, I'd view it as a warning sign for Treehouse fans.