So basically a one handed sledgehammer or the better crowbar... Razors blades in craft to make a razor
bat club because "When life gives you razor blades, make a razor bat".
Staccato Rhythm : if you're copying Flurry, just say Flurry can be used through Staccato seems more consistant than Flurry "all or nothing", also some feats that should apply : Bone Breaker and Heavyweight (it's blunt), Super Slam but less potent when used with a club.
Bludgeon : good alternative to Expose Weakness, I suppose the weapon is armor neutral like the crowbar.
Disorient : make it also available to sledgehammers.
The Lifting belt should help a little with a 2 or 3 AP reduction.
Explosives Cap can be applied
Press F for those needed clubs that will (probably) never be implemented.
You will be missed