Travelling for the fans who aren't based in London, particularly the Northern clubs. FA Cup semi final, FA Cup final and Community Shield within a fairly short space of time.
There is the obvious argument not to have the FA Cup semi finals at Wembley which is the most sensible solution. The alternative is to move to the Community Shield to other neutral grounds and it has been played elsewhere in recent years.
I'm not in favour of any matches being played abroad but just saying it would be the lesser of evils for something like the Community shield (where attendances do dwindle) than a 39th game which could actually ruin a season (and club)