Sustained standardization mostly harms/ruins programming languages.

That said, it would be good to see a Common Lisp standard which cleans up outstanding issues (like whether, when an exit point for a dynamic control transfer is chosen, are the inner exit points below it torn down before the transfer takes place, or tear-down-as-you-go?)

And also standardize some common practices.

A standard way to include special characters in strings would be nice. The C-like escapes perhaps: \n newline, \u123F for unicode and whatever.