Hey team 
One really useful feature could be setting default messaging for Failure/Success on a resource level.
Let's say you've got a API that returns JSON object with {error:{message:"Failure x"}} it would be extremely helpful to set some defaults i.e. error.message is default error otherwise display error message.
This can currently be accomplished but would require updating across all queries/QL/apps for these messages to be customized and over time with APIs change you're bound to re-do it.
Having this at resource level would immensely help maintain codebase.
I'll post here with any updates that I get