As a Devastator there is not much you can do in melee.
Trow grenade at your feet, jump back, and often the enemy will charge at you...blow up....
Leave the melee damage as it is
remove auto lock, that fixes the strong attack spam,
Devastator Aritol ready to purge our Enemys
Didnt they say last stream that weapon mods, loot boxes, visuals and etc are comming as soon as they can patch with the Unreal Enigne 4.12?
Space Marine and Necrons.