They will not achive decentralization with this:
•   10% miners
•   10% Charity proposals
•   60% Masternodes
•   20% Meraki network support proposals

its should be at least
•   40% miners
•   10% Charity proposals
•   40% Masternodes
•   10% Meraki network support proposals

or

•   25% miners
•   25% Charity proposals
•   25% Masternodes
•   25% Meraki network support proposals

But nobody will support such project without benefits for devs to get money from air.
Masternode does not create blocks, POW miners create blocks, MNs only support budget system for charity proposal.
Btw proposal system integrated in Dash long time ago, but its called budget system, so don't say that you are the first.
60% MN create full centralization of the hole system, more MN more the power to control proposals.
And proposals it's free coins at all.