I think your sig line pretty much sums up the problem with your approach. This is the world's game, whether we like it or not. Changing the rules to make it "American" makes it something other than football. Changing it simply to attract American fans (as opposed to, say, a rule change designed to address a flaw in the game, as FIFA has done with the backpass and offside rules) makes it something other than football. If you want to make the game more exciting in America, support MLS so the clubs will earn more money and, in turn, spend it on players who will make the game more exciting. Don't change the rules.