Berserker's really fun with his Smack Down grab, because it's so fast and easy to use, but his Corpse Storm and Rock Smash abilities, which are also grabs, have no default inputs. Having to use the Ring Slot Menu for attacks is really unintuitive and alien, and there is plenty of space for more inputs. For example;

Corpse Storm = Left Stick Forward + X

Rock Smash = Left Stick Backwards + X

Pretty simple, right? I would greatly appreciate if you changed this.

perhaps the problem is this inputs would come in conflict with the inputs from the awakening

That would be cool too. Since zerker needs so many skills hot bared.