Completely against all of these proposals. If you're so hellbent on changing the rewards system, why not make it optional? If I, as a content creator, wish to go 50/50, I can make that choice. If I wish to keep it at 75/25, I should also be able to make that choice. I don't see why one rule should affect all accounts, since curation itself only helps a handful of rich accounts...
Seems to me that all these proposed changes are detours for Steemit.inc. If it ain't broke, why fix it? Why not focus on SMTs and other changes that would help grow the platform?
Just my two cents' worth...