I just got back from Beach Club and we used Minnie Vans 5 times. Two relevant comments:
1) The demand is far exceeding capacity. Most of the time, no van was available and we just had to keep refreshing. We never waited less than 15 minutes for a MV to arrive.
2) I talked to every driver and asked them for details... they all said the same thing. Since they added WL and AKL on August 21, the demand has skyrocketed. They are >100% capacity right now and getting a MV at certain times is very difficult (you have to keep refreshing). One of the drivers said that they have a "bunch" of 2018 Chevy Traverses on order (not due for a while he said), but something about how they have different specs (the model changed) and that was causing problems with adding them to the fleet in the future. All drivers said they have not heard anything about additional resorts and thought it would be a while.
It's clearly a popular ride choice... outside the BC, you would see one at least every 10 mins...