Separate Status and Presence like Skype - they are not the same thing.
Keeping Status and Presence separate is IMPORTANT - we use Status for things like "working from home today". Really big feature that we lost when our company went away from Skype, but now with Teams we may have an opportunity to get some great functionality back.
We currently use an app called "Simple In/Out" to track status. The benefit is that it has geofences that automatically check you in when you arrive at the office (if you enable it on your phone), but if Teams provided a took that was pretty simple to use where you could let your coworkers know your status (actually by entering some text), that would be a huge benefit and might help us eliminate the other app. (And less programs/apps that people are required to use and learn = happy employees at our office)
It would be useful to have the Status comment line back, it is a feature our staff had used considerably.