Skillwires would be cool. Anybody who has played any Shadowrun knows what I’m talking about. Wire up your CNS and be able to slot in chips with different skills, as necessary. For the purposes of balance in Cataclysm, since Cataclysm isn’t Shadowrun, I’d say maybe make the skillsofts themselves a one-shot booster of some number of skill points.
Honestly, with how easy it is to raise skills naturally in Cataclysm, this is probably an irrelevant idea, but it might be nifty for anybody playing a Savant character.