The following is an editorial comment: 
Metz probably came up with the best approach to making a third party speedlite that could be compatible with multiple Proprietary systems when they designed their units to have different bases, depending on which manufacturer was being supported. That meant that an owner could change camera compatibility by changing the module.
Pocket Wizard tried another original approach with ControlTL which they interposed between the camera and the speedlite. By using their own TTL communications protocol they could, combine ETTL strobes from different camera companies to at least some extent, and also include non-TTL strobes.
If I were the product manager for either Godox or Yongnou, I would start with trying to clearly define the requirements for multiple manufacturer interoperability and whee TTL technology fits.
Canon has built a new ETTL system that incorporates radios for communication that permits backward compatibility for its optically triggered speedlites. Yongnou is apparently betting that they can leverage the new technology in two ways; A) build less expensive components that duplicate the Canon devices; B) add functionality via firmware and additional hardware elements to accommodate non-Canon cameras and non-TTL strobes.
If I were the YN product manager, I would look at other camera manufacturers with weak ETTL capabilities and evaluate the opportunity available by creating a camera mounted master (YN-E3 and potentially speedlite as well) that can interface with camera ETTL communications and provide protocol conversion to the Yongnou 600 system platform. i.e. have a YN-E3 that would sit on a Fuji X camera and deliver ETTL capabilities via Yongnou 600EX-RT speedlites. Replace Fuji X with Sony A, Nikon, Olympus or whatever.
Godox has chosen to build a device that fits into the Canon legacy optical ETTL system. Its only unique capability is an internal Lithium battery. Its remote power control system for the bare bulb series needs updating. Hopefully it have some plans in the works that will enhance its capabilities. For example; Ability to set H mode remotely. Ability to optimize FP sync to camera platform. Ability to use H mode with more than Canon cameras. Trigger with hotshoe pass through that supports H mode on Godox lights while on camera speedlite is in ETTL with camera.
And, finally, what the V860 Ving TTL should do is offer ETTL on camera with an H mode FP sync triggering capability built into it to fire off camera Godox bare bulb strobes.
Now, back to the regularly schedule thread.
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