"American UBI: for and against"
"A brief history of Rosicrucianism & the Invisible College"
"Were almost all the signers of the Declaration of Independence high-degree Freemasons?"
"Have malaria case rates gone down in areas where AMF did big bednet distributions?"
"What is the relationship between economic development and mental health? Is there a margin at which further development decreases mental health?"
"Literature review: Dunbar's number"
"Why is Rwanda outperforming other African nations?"
"The longtermist case for animal welfare"
"Philosopher-Kings: why wise governance is important for the longterm future"
"Case studies: when has democracy outperform technocracy? (and vice versa)"
"Examining the tradeoff between coordination and coercion"
"Spiritual practice as an EA cause area"
"Tools for thought as an EA cause area"
"Is strong, ubiquitous encryption a net positive?"
"How important are coral reefs to ocean health? How can they be protected?"
"What role does the Amazon rainforest play in regulating the North American biosphere?"
"What can the US do to protect the Amazon from Bolsonaro?"
"Can the Singaporean governance model scale?"
"Is EA complacent?"
"Flow-through effects of widespread addiction"
I doubt that there is any one answer re the marginal value of such projects, because the value depends on what is being governed. For instance, I think a successful implementation of regulatory markets for AI safety would be very valuable, but regulatory markets for corporate law wouldn't be; yet the same basic framework is being implemented.
For this reason, I'd be more interested in analysis of governance innovation for a particular cause area.