Dude,
I hate to say this, but it is unlikely this is going to happen. PC is not going to allow a class that they control to chose their own destiny. It is not in their financial interest. They have no incentive to update the sailplan until they have competition. That is all part of a single manufacturer controlled one design class.
On the other hand you could form your own class association. Call it the Nacra 20 class owners association. Hold you own Nationals, make your own rules. The problem with setting up a class like this is most sailors in the existing US class won’t buy in to it. A large fraction of the racers feel that this just leads to an arms race in equipment. This is not really correct. When I looked at it several years ago it was always cheaper to get sails in classes that had competitive sail makers and the sail makers pushed the development to sell product.

If you can realy form an effective owners association I think you could improve the class tremendously. It is however a SH*Tload of work and you would earn lifelong bad will from the factory. Is it Worth it?

My own personal opinion is that you are only going to get consistent development and high quality when there are multiple options available. Take a look at a new A cat sail sometime. The quality is so high it is unbelievable. It has to be. If the Glaser sail wasn’t perfect and did not go fast, I would buy it from someone else next time. I have 8 or so good options for sail makers. All of the sails I got from PC were inconsistant several had major flaws.

Just as a (not so)funny story, I bought a new 6.0 and it was going to be displayed at the providence boat show. It got rigged for the first time at the show. We put the sail up and the luff was so long it came all the way to the bottom of the mast base with no downhaul on. We had to measure the mast because the first thought was that they built up a Nacra 5.8 mast section (shorter) instead. Turns out my new ONE-design sail was 7” longer on the luff then the previous one from a year before. I ended up having a local sail maker cut 5” off the sail so I could downhaul it. This of course was totally illegal in the class rules

Good Luck,
Eric