I would strongly oppose this change on the grounds that it would make the very dangerous "Not A Refnum?" test harder to find in an application. Here's my post on the subject:
If you are writing code like what is shown above, I am very worried about your application's correctness. I would advise you to rewrite your application to avoid that pattern. See the post on LAVA for details.
Duplicate of https://forums.ni.com/t5/LabVIEW-Idea-Exchange/Allow-References-to-be-Wired-into-Case-Selectors-to-C...