This all makes sense, but it doesn't mean that this is a good solution.
Obviously, parity of equipment is what Edmonson is going for. He is also trying to glorify privateer participation.
The short parts list achieves 3 things that meet with his objectives.
1. It puts all suppliers of custom motorcycle parts in competition with one another. When suppliers vie for 1 spot, it causes prices to drop significantly. Privateers are happy.
2. If prices drop significantly performance will likely flatten and stagnate. Safety concerns are met.
3. Short parts lists ensure that the series resembles a spec bike series. Privateers are happy.
I'm not sure this is a particularly good idea. I'm worried suppliers will cozy up with DMG and certain teams. Kind of like the allegations about Pirelli in WSBK. Some teams will get quality product, the others will get the leftovers.
Fact of the matter is though, if you aren't the premier Superbike or Supersport series, stop pretending to be important and work on cutting costs.
I know this may seem a bit far fetched but these rules are extremely good for aspiring racers. The fiercer the competition, the more finely tuned the talent. The more finely tuned the talent, the more likely it will be respected by the motorcycling world.
Like it or not the AMA has always been nothing more than a talent pool for international racing classes. Some day that may change, but for the time being Edmonson appears to be going back to what works.
If everyone has a chance to win and the governing body gives nice paydays to the winners, it will turn the AMA into a talent-rich shark tank.
Assuming of course that the AMA style is useful in other series.