Not voting because none of the choices are realistic, but the answer is no.
Theres plenty of ways for players to make the game artificially harder if they choose. The fact that a well built character can become truly super doesnt mean the system itself is in need of nerfing or tweaking, it means you can choose to go all the way to 11, or dial it back to 1 and run unslotted using brawl from lvl 1-50 if you so choose to walk the hard road.
You are the one who controls how hard the game is by the choices you make when building your character. Nothing about the way the numbers crunch needs be changed, its already in your power to dumb yourself down as far as you feel makes it more exiting for you to play.