Users would like to query EntitySchemas through the query service.
There is now an experimental query service at https://adhs-wde.toolforge.org/sparql that has a subset of all EntitySchemas. The default query shows that the ShExC code is embedded in the RDF as a rdfs:comment and can so it can be queried too. The next milestone is to load from the WD database instead of static files.
We have now finished the work on creating a space for community discussion of schemas.
Having EntitySchemas in queries and as part of statements will allow us to make use of them much more in Wikidata. E.g we'd really love to have a property called something like 'Community agreed schema' for a topic to allow people to more easily understand and use schemas, possibly it could be this existing property proposal https://www.wikidata.org/wiki/Wikidata:Property_proposal/Shape_Expression_for_class