Shade said, "Although the original didn't account for it, I think it would be fun to make it a psychokinetic burst weapon." So make it a +5 psychokinetic burst greatsword.
Oh right, you're referring to the weapon property.
I'm not that fond of the burst bit, I'd rather do something like psychokinetic keen or psychokinetic shock equal to the same +2 modifier.
Alternatively, we could reduce the +5 a bit and add something tougher to the psychokinesis, such as a +4 psychokinetic collision or +3 psychokinetic soulbreaker for the same total plus value.
Also from Shade: "Also a minor quibble, but I'd make it "Healed by Acid and Electricity" rather than Lightning." Shall we make that change?
Funny, I thought I'd already changed that. Although I think "acid & lightning" (or possibly "bile & lightning") has a better ring to it.
Updating the Working Draft.