I believe we need "downvote", but not "FREE downvote".
"FREE downvote" indeed has some good achievements after HF21, as mentioned in the proposal. In my opinion, it's a nice short-term strategy.
But it doesn't mean we need "FREE downvote" in long term, which indeed encouraged the attack to more victims rather than identify and focus on the actual misbehaviors. I have analyzed why that is the case with data in the proposal.