Sports can be viewed through many different lenses. You are looking through the competitive lens, trying to achieve parity much like American leagues. This of course ignores the fact that in the bigger picture, sports is an industry, and the industry of football employs more people and pays its labor much better than the American leagues could claim. While the NFL, NBA, NHL or MLB can say, "look at all the different teams that win here" UEFA can look across all of its leagues and say, "look at how well our professionals in the second, third and fourth divisions are paid." There is no second division NFL, lower league baseball players earn what kids can earn selling ice cream in the summer, and second division basketball earns similar to what League 2 footballers earn.
UEFA should tread lightly and consider the overall health of the sport before regulating its growth any further. There will always be a market reaction to any new regulation, and that reaction looks quite obviously to be a move by the biggest clubs to break off into a Super League, crushing all of the strength that football derives from its lower leagues.