Bryth is right, if the issue is you don't want CoP rings to over-shadow the other Expansion Pack rewards... then make them ALL scale up. They really should have already.

OK, that took me about .3 seconds to conceptualize and I don't do this for a living. What, are you guys operating on the "infinite number of monkeys will eventually write Shakespeare" platform? Then start withholding their food, giving back only as an incentive to reward production. Come on, there are several completely viable, non-balance affecting solutions in this thread alone, and this is NOT the only thread.