I think it's a case of Glastonbury doing what it has always done - pleasingf itself, and frankly, after the lenngth of time and experiences it has provided, it is fully entitled so to do.
I fail to see what anyone would avoid a three-day event simply because they don;t like one perfomer - albeit the closer - after all, there are plenty of bands of every size and musical shape to please the most eclectic of tastes.
I would suggest it is memories of foul weather, increases in living costs, and ompetition from so many other sumer events that has caused a downturn in ticket sales.
Poor Michael Evis - if his festival sells out quickly he is a capitalist - and if sales are slow, he has the music taste of a dullard - we should be thankful he puts himself through this every year - even if his audiences are impossible to please not matter what he does.