The pies aren't all that. I certainly wouldn't go as far as to say that my matchday experience would be worse off for not having one. Anyone who wakes up and thinks "it's football day, I can have a pie!!!!!!!!!!" should probably trying Ebaying "new life"
Alternatively, if the 20p pie price increase is enough to put you off buying one full stop and you had previously done so at every home game, working on 25 home games a season you could save yourself just over £100 a season - or 1/5 of next years season ticket depending on the inevitable increase