My main wish:

Please don't refuse to compile just because there are unused imports.

Please do warn, and loudly say it's NON-CONFORMANT or whatever will embarass me enough from sharing my piece of Go code with someone else.. but.. can I please just run my code, in private, when experimenting?

I'd be even more excited if the compiler were willing to execute complete heresy on my behalf and (with user consent) edit my source code automatically to remove unused imports. ;)

You mean have the compiler modify the source code files destructively? Then I'll have to disagree, that just doesn't make sense.

A more modern implementation: https://github.com/munificent/vigil