Again, I agree with what you are stating.
Although I do not think that the complete HF19 was bad. The change to the square root curve for post rewards, I do like. I'm not sure of the linear curve that was the replacement is the best way forward, but this is part of HF19 that was not that bad.
On all other points I agree, lets build (back) into the code those things that will reduce the abuse. Any abuse left that can not be handle by code, let that be handled by a body within the community rather than by individuals or groups of community members, since I believe the best way forward in whatever we do to fight abuse, shall be done with community consensus, so we need a system where the community can vote for what we define as abuse and what not. This can only be done centrally. Then we can have smaller groups supporting the whole thing.