No. An alert system should only ever be used to inform users of security problems or forking events. It should never be used to inform users of updates, software improvements, new versions, etc. that are not related to the security of a user's coins. Any sort of intentional fork should never be announced over any alert system.
1. Why? You've said this as if it's self-evident, but it isn't. What's wrong with alerts/notifications for updates? I guess you could argue "alert fatigue" would lead to people ignoring it, but then ok, if I go with this...
2. So keep the alert system for hard fork changes? There's a huge wishlist of things that are never going to be implemented at the current rate because nobody wants to do a hardfork - for the very reason that you can't get users to upgrade their software. Why isn't an alert system seen as a solution to this problem?