For your example of OCS, the rest of the fleet isn't brought into the room because you have both sides of the issue already represented - competitor says "it wasn't me" and the line-spotter says "yes it was," or "I'm not sure." Decision rendered, and reopening extremely unlikely.
John, The A cat worlds are the OCS example that comes to mind. Mitch Booth is called OCS... Booth files a protest argues No he was not. Claims Individual Recall Flag was up to slow and he was not given a chance to restart. blah blah blah. For what ever reason the protest is upheld and Booth given redress of 5th place.
Right or wrong call ... it was done.
The fleet is outraged because they claim the individual flag was flown promptly (fact at issue) and Booth should be tossed for OCS.
Under the new standard, I think the fleet's claim for redress from the redress will be heard. And on and on and on it goes.
My solution is better judging, training and experience on the PC panel and we should not resort to changing the process.
I understand the goal you want to achieve but don't think that changing the game this way will be workable or fun.
The USOC is dealing with the many many screw ups of US Olympic Sailing indirectly.... It may be their only tool but the collateral damage is high.