Nick, here is what Dave wrote:

"The Epic is not the worst case scenario. The Epic, by itself is nothing. The Epic opens up the doors for a worst case. If the Epic remains legal, there is no difference between that and another disc with a six inch rim on one side, and a fingerhole for a grip on the otherside. A delineation needs to be made between a "Frisbee-like" disc and a discus like disc. Something needs to be written like: "the rim thickness can be no wider than 10% of the overall diameter."

DL, thanks for the motorcycle manufacturing analogy. I don't follow racing, but maybe some of the rules of NASCAR would help illustrate why the PDGA would be wise not to open the door too wide here.

Let's suppose someone designed a disc that was not evenly balanced and could increase the average player's distance 50%. That would not make an average golfer any less average, it would only mean courses would eventually have to be re-designed to catch up to the new technology. For a honeymoon period, average golfers would kid themselves that they were now long drivers.
(Plus courses would require more real estate to fit in 18 holes)

I think a special class of gimmicky discs could be created and maybe a few G-tier events could be held with them were there interest. If that became what everyone wanted to play then it could become mainstream at that point. The Epic may not be the disc which starts us down a slippery slope, but it may open the door to one that does.