the rx0 is not an action camera and about the only comparison to them is size and the fact it can be used for some of the same tasks which don't require their superwide lenses. i don't understand why you claim sony is trying to compete with dji and gopro.
what it does have is firmware very compatible with sony cine cameras and can be used in pro cine shoots and the footage easily incorporated when it's time for post processing. the accessories are all nosebleed expensive, i got about 20 minutes of battery life, and on my first test it overheated (even in the cage) and quit at 10 minutes shooting 1080p. and i don't believe my original model even shot in 4k internally.