Not quite. My suggestion provides essentially a quadratic curve, because you get the effect of both frequency and balance, whereas CBR, you get only frequency. Maybe quadratic is too much though. The problem with this is to balance all of the incentives/disencentives for the whales, medium, and small balance holders so as not to upend the gridcoin economy in the transition.

Unless I am misunderstanding something, we also still have the problem of long staking periods (low frequency) for really small balance holders, which remains a discouragement for new participants that are not using a significant initial investment.