Using the lion's share of their witness earnings to fund Steem-related projects.
I disagree with this..... The lion's share of their witness earnings should go to to the witness.... to keep them motivated for the work involved in paying hydro fees, server fees, internet fees. Time spent to update their witness node.. to keep the node secure and up to date with all software, etc. For the witness to update again for good hardkforks, talk to the community, etc.
Funding steem-related projects needs to come from upvotes and raising funds from the community itself. That's regular people. Not witnesses. New steem is created everyday and as curators, we can spend that newly created steem towards steem-related projects (like eSteem) for example, who has been making a lot of decent money from his latest posts, which is only fair, for the work he put into it.
On another note, I like the idea of re-evaluating your witness votes. That is something we should all do a few times a year. :)
I formed that expectation back when witness pay was much higher (might've been HF13 or so when that changed?). There was a time when each witness was making $250k/year. It may be time to reevaluate that bullet point.