I'm interested in the logistics, especially if the whole festival was pre-pitched. The OP talks about ensuring groups of friends are kept together, but if everyone wanted to be in Pennard Hill, or Big Ground, how would this work in practice?
Would it be another bunfight (admittedly only amongst ticket holders) where people try to get the campsite they want in an onsale? Or would you have less choice over where you go, and instead be allocated an area? It seems to me the latter is the only way you could ensure groups were camped together?
If Phase 1 is a dedicated area with pre-pitched tents inside the fence, and cost £20pp on top of your ticket, I'm gonna suggest it would sell out very quickly, even if members of this forum wouldn't be the ones buying it.