Super Strength for Scrappers and changes to Rage are always hot topics. This suggestion side-steps both by creating a new set called Mighty Melee available to all Melee Archetypes. Here's my rough idea for powers: (Yeah, it's a lot like Super Strength but that's the point)
Clobber: This is a one-two punch like Barrage, but can cause KD
Punch: Same as Super Strength set
Smash: Basically Haymaker but more damage
Taunt/Confront/Placate
Handclap: Same as Super Strength
Build Up: Same as most Build Ups except it also adds a Stun to every attack
Footstomp: Same as Super Strength, but earlier
Hurl: Same as Super Strength (maybe a Targeted AoE? That would probably be overpowered.)
Knockout: Not quite Knockout Blow, uses the Crushing Uppercut animation
I kept it simple because I'm not really a fan of combos or gimmicks, just added the Stuns to Build Up for some flavour.
(Also I just realized "Clobber" is already the name of a power in War Mace, so feel free to suggest something different)