Nice info, will be very interesting to see what changes emerge. Incidentally, BA's soon-to-depart James Hillier told me at a customer event about a year ago that he was headhunted by Easyjet for the new loyalty job (but clearly either didn't get it or didn't go for it!).
I trialled a full switch to Easyjet for a period of a few months twice in the past three years (including EasyJet Plus) and both times I've given up because of very poor punctuality and often unpleasant boarding experience. I'm aware this can vary significantly based on personal travel patterns but my experience of Easyjet at LGW, LTN and LYS (all bases for the airline) has been less than stellar. Maybe a loyalty scheme will tip the balance?