Just chiming in here, as a 'v-ray one day / Corona the next' user, my absolute favourite thing about Corona is the tight integration with C4D and all its shaders/noises/falloffs etc etc, you all know what I mean. If implementing a DR option means killing off that ability to use those shaders on slave machines, then please, please don't do it, or at least make it optional. V-Ray is great but its a major pain in the backside weeding out all the materials that don't work over DR, especially if, like me, you're too busy to model & make your own, so own lots and lots of 3rd party material libraries (90% of the materials don't work properly over DR).
Unfortunately for me at the moment, Corona Team Render doesn't work but I think its because I'm using a Hackintosh as a slave (windows won't run on it for some reason!) so I get embree crashes every time. I'm hoping to get a threadripper soon and then I'll be able to use that as a slave from my trusty old Mac Pro.
Cheers