Today, AW Cellular is the best smartwatch out there for health and, fitness + safety. Always when cellular available. With the AW Ultra, I think many would activate their Cellular plan for the watch.
WOD is the best fitness app on Apple Store for Apple Watch. Any safety option through the app could be a game changer for many of us. When you have time for that, you can think about something.
A screenshot with the map/route was just an example, or a simple SMS from the watch when you start exercise with WOD, like “I'm in the park close to home, will be back in 2 hours.”, could be interesting, lol. Why not? I don't know if that is possible. Using the GPS from the app with the location and setting up a kind of SMS, pres send and run ).
A live Beacon is the best option, and I'm sure many will pay an extra fee to use it, but probably highly complicated to implement it; no idea.