I would still take the deal on the second 150. It sucks they screwed up the deal, but you'll still never see VGF at these prices. Yes, you can haggle on resale, but 150 points VGF doesn't go super far at that home resort. I think you're going to need/want those other 150 points, and if they're not selling back the MB points on the second contract, maybe you could rent them out on your own? Win-win, it's the same deal, and you get all direct points at the same resort.
At the end of the day, it is STILL a really good deal for the showpiece of
DVC WDW. I'd go forward. In another year or two, after vacationing, are you going to care about the difference?