I think PVB will be a bit easier than other places to get in to.
360 rooms. A lot of rooms. All of them studios. To give you a comparison, Bay Lake Tower has 428 rooms split between studios, one bedrooms, two bedrooms, and Grand Villas. Animal Kingdom Lodge (both Jambo and Kidani) have 458 rooms. While PVB isn't the biggest, it has nearly 3 times the number of rooms of the Grand Floridian Villas (147).
Any family with more than 5 people are going to be completely locked out of PVB, not counting the bungalows. 5 in a studio, even one the size of a PVB room, is going to be tight. I don't think a family of 5 is going to book PVB that much. I don't know the stats, but I would guess the fact that PVB is studios only pretty much discourages about 1/2 of the DVC membership from staying there at all.
If you look at only studios, PVB probably has a comparable number of just studios as resorts like SSR and OKW. Those resorts are very easy to get in to just about any time of year at 7 months.
Also the rooms at PVB are very expensive compared to other rooms. This will discourage the point pinchers.
All-in-all, there are a lot of people I can see who won't stay at PVB. Honestly, I'm not too worried about getting PVB at 7 months unless during a peak time of year. I would guess that it will be somewhere between BLT and SSR/OKW in terms of booking difficulty.