I feel the same way about Powersets being tied to a player's Origin, so I have an alternative idea for a Powerset: Staff Blast.
"You use a staff to bombard enemies with various elemental attacks." Even better idea borrowed from the Dual Pistols Powerset: Have a Power similar to Swap Ammo to choose which type of Element you use. Possible options would include:
Fire (does Fire damage with minor DoT)
Ice (does Cold damage with -Recharge and Slow)
Energy (Does Energy and Smashing damage with Knockback)
Darkness (Does Negative Energy damage with -Accuracy)
Psychic (Does Psionic damage with -Recharge)
Electricity (Does Energy damage with -Endurance and -Recovery)
Also, Weapon customization would allow for selecting Magic staves, Technology Staves, etc.