I think there is still space for an alternate Go syntax for scripting with the following constraints:

* a single file exposing a "main" package and its "func main()"

* import syntax that merges requires from go.mod (import both packages and modules)

* simplified error handling (just ignore returned errors in code, and they are caught by the transpiler to be handled as fatal)

Those are my ideas to go beyond my own goeval that already allows to run Go oneliners. https://github.com/dolmen-go/goeval