Zebbi MagiCam is certainly doing more work than scrollto, but it's nothing overly complex, and is almost certainly faster than implementing the same features in events, so I wouldn't expect any performance issues.
That's excellent, just what I was hoping! One other question was, does Magicam have a way stabilising scrolling, essentially? For instance, if the player object was a bit jerky or shaking due to terrain or some other movement related reason, does/could Magicam have a way of ignoring he tiny motions and just smoothing over the scroll?