I think they didn't put in the 1 and 2BRs at the Poly because DVD remodeled the old longhouses (which the Poly preferred they do). Those long houses were built with the
"unitized modular construction.” So the side walls couldn't vary. That would mean a 2 BR would be 3X the size of a studio. That is a lot of space for a single family (447X3=1341) which is over a 100 SF larger than VGF's 2BRs which is the DVC flag ship resort. If they had built a multi-story building from scratch they could have done it. There is always hope in the future they will add another building of 1 and 2 BRs.
Regarding people buying direct, there are a lot of people buying direct and threats to end or restrict privileges will draw more to purchase direct. People fall for that all the time, even when they will never recoup the money spent.