You’re in the ecto core team, so there is at least one thing you can do: either confirm that a visual editor for contexts is a good idea or dash my hopes ahaha
I know it’s probably not a good idea because contexts are not a declarative enough concept (they include functions, and editing those with a visual editor is visual programming and therefore will fail as history has shown again and again), but an interactive schema editor that maps schemas to table columns and migrations to full tables would be feasible (through introspection of the relevant ecto structs). Am I right?
Also, you might start working on a demo open source app that uses 2 or more contexts. I can’t do it right now due to time constraints, but I might do it in the future 
having a single conrext doesn’t show all the advantages you get by using contexts.