Yeah, having thought about it more, time and complexity are major issues that should be considered. If everyone was going to a weekend PPL meet-up where that's what the weekend was dedicated for, it'd be more conducive to a more elaborate set-up. People would be going expressly for that purpose and probably would be more apt to follow a more complex scheme. Seeing as how this is a fun player-run thing in conjunction with PAX, leaders and challengers alike undoubtedly have a laundry list of things they want to see and do.
Personally, I think the general idea of trying to lighten the load of the gym leaders is good, as the lines at the meet-ups were a bit discouraging. It's just a matter of finding a good way to do it without disturbing the simplicity and attractiveness of the event as a whole.