I think your h ead is in the right place, and I agree with number 1 and number 2.
However, i think 3, 4 and 5 are a bad idea.
I do agree that changes are needed in curation rewards. But i don't think the changes you propose are sufficient. (im posting some ideas later on about how i would go about it).... Right now, i see curation rewards as a confused jumble of carrots and sticks, with no real focus. re-arranging that mess is just going to create confusion. Something fundamentally different is required IMO.