Looks promising but the demo app is very slow. When I pick a CMS, the tech stack is a consideration but I scrutanize the admin interface much much more.
P.S. I'm not the author.
Major problem for now is that in some places it still doesn't retrieve data with the right projection, for example when creating a menu it loads all the pages with everything in it. That's why I'm switching to Relay to make this easy pie and more reliable
Right, I agree. And interestingly, I'm firmly of the opinion this is one of the reasons Wordpress continues to win in this space; albeit for familiarity reasons rather than it being a paragon of good UX, and despite it's core and plugin system being incredibly ugly in too many ways.