Wow, it looks like being a Steemit witness is your full time job! (Though I understand that it's not, especially looking at your point about the PhD application:) good luck with that!
I am sending you my vote for witness.
And regarding the rewards for @steemcleaners, I support the idea of powering up the users instead of sending SBD. Might not be so popular as an idea for those who are looking for more liquidity and faster cash out, but users who are actively engaged in building the community and helping Steemit grow should be fine with the long-term rewards.