If you want WordPress to notify you when plugins are removed or changes ownership, then you need to make sure your voice is heard over at wordpress.org, specifically to core and the plugin teams. Several of us have argued before that users should be notified. The plugin team's response so far is that notifying people would place more people at risk (I'm not making that up) because then attackers would know of the vulnerability too. I steadfastly disagree with that reasoning, but I'm only one person out of hundreds of millions.