For football I like the college football 25 yard both teams a possession.
My innovations are more in the self proclaimed beautiful sport;
For soccer(the other football) I prefer implementing a blue line concept similar to hockey to open up scoring(minimize impact of offsides) and the end of the game being decided by removing players from each team in ten minute increments until someone scores. Love golden goal and can not stand shootouts or ties. Any thoughts on these ideas?