I'm in love with Jesus and proud of it!
Lower shields but much higher health, slower walking/running speed and slightly higher gravity, insanely OP melees, and Spiker/Needle Rifle starts. The only AA's would be AL and Drop Shield, both available as pick-ups and not starts. Grenade carry would be only 1 plasma and 1 frag.
Available map weapons would be Spiker, FRG, Plasma Rifle, Needle Rifle, Plasma Repeater, Concussion Rifle, and of course the Gravity Hammer.
The gameplay sounds terrible but fits the Brutes well IMO.