I won't comment on the whole post, but you are mistaken about the meaning of the 10% threshold for approving proposals. It is not realistic for Evan & the rest of the Core team to past a self-serving proposal against the wishes of the rest of the community since the formula for approval is YES VOTES - NO VOTES > 10%. In other words, so long as Evan and Core own less than 54.9% of the MNs (since 54.9% - 45.1% = 9.8%) they can't do anything like you describe above. And no, there is zero evidence that they own even 1000MNs much less than the approx 2400 nodes you would need for that attack.
The current system may indeed have yet undiscovered flaws, but a small group of people with a lot of MNs overriding the wishes of the entire community is not one of them.
Well, that's certainly much better, but the official Dash wiki says "If that proposal is approved by at least 10% of the masternode network, then at the end of the month a series of "superblocks" will be created. At that time, the block rewards that were not paid out (10% of each block) will be used to fund approved proposals. The network thus funds itself by reserving 10% of the block reward for budget projects." https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=84672534
Assuming that you're right and the wiki is wrong, well, that certainly alleviates most of my concern, although I have to wonder what threshold have to vote for it to be approved. I.e, what constitutes a quorum of voters -- how many masternodes have to participate in the voting, for a valid vote to be held? And are votes carried over to the next month if they aren't decided?
For that matter, there should be 3 options for voters -- YES, NO, and ABSTAIN -- where ABSTAIN voluntarily removes that voter from being counted YES or NO, and thereby reduces the number of votes necessary for a quorum (however defined). In this way, voters can express either a "don't care" opinion (thus voluntarily giving others the power to choose) or a "recusing myself from a conflict of interest" vote.
Yep, it probably can be worded out in a better way, so the way it works is actually "at least 10% more of masternodes have to vote yes than no" or smth like that. And yes, ABSTAIN option is implemented in 12.1 https://github.com/dashpay/dash/blob/master/src/governance-vote.h#L22