Don't dispute that Friday is busy, but on other evenings it is much less so. Overall LF on LGW is 67% from 78% in April 2014, which suggests that the competition from BE is biting a little.
From conversations I have had, more and more people are finding the overall EZY experience less and less palatable. For such a short flight, is it worth putting up with, poor time-keeping and regular delays; a painfully slow boarding and departure experience at IOM; long, slow, bus rides, and consequent waits for the slowest passengers at LGW; transferring terminals to get the train; arriving in London close to midnight. Not a lot of fun.
I'll be giving STN a go in couple of weeks, and if it works OK, it'll be bye-bye to easyJet, for me.