Personally, I prefer that Corona developers focus on the main basic features that are missing before jumping to those fancy stuff.
what I mean is that with - enough -money I can get any 3d model I want and I can render online on any render farm, but if a very crucial feature in the renderer is missing I can't do anything about it.
Proper PBR workflow, Better tone mapping, Deep EXR , Corona Clipper, Crypttomatte, Supporting VRScans, and many many more features are much more important IMO s than few 3d models and another option for online rendering.
Corona team is doing great with catching up with all these missing features ( just look at the V6.0 release for example ).so I prefer they continue spending their resources on this.
Remember that Vray came to this after many years of development while Corona is still -relatively -young and needs to fill the missing gap before jumping to those additional things.
just my 2 cents.