Auto-update doesn't carry the implicit moral right to install anything company behind it wants.

Auto-update is a consensual agreement with the user. If you use auto-update to deploy something that a vast majority of your users do not want and did not expect, and intentionally so (refusing to roll back a 'mistake'), then you have broken that agreement or moral code.

You cannot use the excuse of "oh well if they don't like it they can uninstall it and use another product" to condone this bait-and-switch behavior. Just because the behavior is legal does not make it moral.

This behavior is absolutely immoral and must be condemned.