Nit: "The update will now prompt users if they want to open the app, whereas before it would open automatically." It doesn't appear that they removed it, but just that they added a prompt to inform the user before Zoom runs silently in the background.
Note that Edge and IE on Windows will also launch Zoom without prompting the user. Though that behavior is due to the WarnOnOpen registry value, and isn't quite as abusable as the localhost launcher (Which can be triggered via reading an email, etc)