True dat. A bigger league would see a number of teams who are delighted not to be relegated, but don't have the talent or resouces to kick on for the top 6/4 (see: Premiership, The). Plus there is always the issue of number of games. Unless we expand to at least 18 teams, I can't see there being enough league games to satisfy clubs used to 38 league games a season, barring an expansion of the cups, which probably isn't feasible.
I do however think there is an increasingly attractive case for summer football.