I think it's neat the Frank sought out the community's opinion on this one. I also think it's neat that the community (at least the people vocal enough to post on ChiefDelphi) has pretty much come out an said they like the current system. Consensus is a good a thing. Of course, this is easy for me to say since I agree with the consensus that is being presented.
There's no reason for me to rehash why I think the current system works, since that's been taken care of quite eloquently by many of the above posters. But I do want to draw some attention to one major thing that can be improved. The current system works best when the best robots are ranked high. What can FRC do to ensure that the top robots end up being the top ranked teams?
Maximize the number of matches each team gets at an event.
There will always be randomness in FRC, because of the nature of the random alliances involved in qualification matches. The alliance system is central to FRC, and is not something that's going away. So to minimize the randomness it introduces, we need to play as many matches as possible. This is happening in the regions that have gone to districts, as well as Ontario, where teams are consistently getting 12 qualifying matches at events of 30-40 teams. This is great. Only getting 8 qualifying matches per team at the Championship in 2013 was simply unacceptable.
The good news is that FIRST recognized this problem and is making efforts to fix it for 2014. Still, as FRC grows there will be a tendency to want to add teams to the Championship Event. This is fine, but FIRST needs to make sure that as they allow for growth of the event, they simultaneously allow for growth in the number of matches.