This is an interesting idea. Simplicity is always preferred to complexity, and complexity should have a strong justification. The complexity for rewards distribution was driven by the desire to peg SBD to the dollar. When that broke down, the hard peg was disavowed by Stinc, treated instead as a soft floor.

Without a commitment to the hard peg, the complexity of distribution is no longer justified. You present a more elegant solution, which (ironically) actually will strengthen the peg, as your solution incorporates reverse conversion.

Very elegant. Good luck convincing the witnesses!