A few thoughts.
Bond Requirement: Seems like a good way to incentivize reward hoarding by P-Reps. Especially if the bond is anywhere near 10% as Benny_Options mentioned. That’s way too high. I think this would empower self staking whales more than anyone else. Don’t really see how it fights vote buying either. I don’t really buy the “many voters are scared of being burned” argument. If they are - they shouldn’t be. As most of us know, it would take hundreds (or even thousands) of consecutive down days to fall below 85% productivity and activate the 6% burn.
Voter Behavior: This one feels a little bit backwards. In my opinion, by doing this you would disincentivize contribution and reward passiveness.
Let’s be honest, in this kind of system, most people will vote to get more gains. They won’t look at contributions. I see this as a pretty huge handicap for any new up-and-coming, contributing teams who would be slammed back down as soon as they touch Top 22 because Sub-Preps nodes offer bigger rewards. I like the idea of improved vote distribution but I think the focus should be on getting those votes out to the few Sub-Preps who are actually contributing. I understand that’s the tricky part.