"We" who? And why? VIP is not a tremendously popular product. Even on the busiest days, VIP is almost always available in my experience. Dedicating two large parking lots to VIP sounds HIGHLY, HIGHLY unlikely.
It's also worth noting that BGW has increased space in England thanks to the new-ish bus parking policy.
Is there a preferred shortage on busy days? Definitely. Will Preferred be entirely removed from England and France? Definitely not.
No shot at all. That would require a massive, massive change in the ratio of VIP/Preferred purchasers to regular parking purchasers. ESPECIALLY on super busy days, BGW wants to limit the flow of guests across Route 60 to prevent illegal foot crossings. This means balancing the influx of traffic not by parking tier but by volume.