The one in which people are still running MSQ roulette? aka: This one. It's amazing how it still manages to happen when everyone abandoned it, eh?
It'd let that one guy who is new to Rabanastre not get locked out on the last boss in Rabanastre. That's about it. As with MSQ roulette it's not an elegant solution to the problem (several better alternatives have been suggested), but the time required isn't really comparable.