Okay, it isn’t entirely broken, but the snappy and responsive GUI that existed until 15.23 is over. This is worse than my old 1000. The touch response while navigating a course is very laggy (to include Di2 button inputs) when changing screens from the map, the map itself renders inconsistently with frequent blank screens and apparent GPS loss when the screen goes blank, and checking Strava and Wandrer after a ride uploads (more eon this follows) confirms that the device loses GPS lock. These issues were not present in 15.22b or prior.
Also, ride uploads over wifi and BT remain intermittent. An issue that presented with Beta 15.21. Still not fixed. The only way I can reliably get a ride uploaded is by connecting to one of my laptops running Garmin Express. Posted here because this is not a Beta build.