It is the release of players not playing that bugs me. I don't mind some overlap, and always enjoy the fan village on international days. For Wales England this year we went to Coventry Welsh, though. Soccer has a mad, mad Christmas schedule, remember, so although it has no international overlap the players are shattered by the end of year.
The issue for me is we can lose players for weeks who never put their boots on in anger.
This year it is different, and the overlap is nuts, but we have some super youngsters who will take opportunity with both hands.