I found OwnTracks to be pretty good for accuracy too but it consumed too much battery to use “Move monitoring” all the time. So I gave up on using any GPS based presence detection. I’m sure it works great for those with beefer batteries on their phones though. “Significant change” monitoring is not good enough to detect coming home events. Sometimes it never switches over to being home at all.
BTW, OwnTracks can talk directly to OH (through myopenhab.org) without requiring MQTT using the GPS Tracker binding. To my surprise, it even shows family on the map like it does with MQTT. The only reason I’d recommend migration is it’s much easier to set up geofences and similar triggers. For new users I definitely recommend getting started with the GPSTracker binding over the MQTT approach.