AFAIK that vote shift stuff is still in the HF20 development code.
On the topic of dust votes and dust rewards (as well as this post), there are two different issues, one concerns individual (very small) votes and the other individual (very small) reward payouts. I'm not aware of any already-implemented changes to the dust rules for reward payouts in HF20, only for dust votes.
Okay, that's the distinction I was missing dust votes vs dust payout. Thank you for clearing up my confusion. I really do appreciate it.