The safest way to make a change to Rage is to keep the current version and give an alternate power choice like Practiced Brawler/Master Brawler. So if you hate the changes you can just ignore them.
My suggestion would be a toggle version- it gives +ToHit, +Dam, but also increases End use on all your attacks.
Or maybe a regular Build Up power, but if you choose this you also get a small passive damage boost.
My other usual suggestion is to just create a whole new "Smash Melee" set as a Super Strength rework without losing Super Strength, and make sure it can be used by Scrappers as well.