#4 - Sept. 12, 2012, 9:44 p.m.
If at all feasible, we're not going to be adjusting the content itself. Persistent leaderboards are the backbone of the system, and if we make the dungeon easier, then your 14:13 time last week might actually be more impressive than my 14:05 clear today, but there would be no way of knowing that. It's conceivable that we might adjust the actual Gold/Silver/Bronze cutoff times slightly if it turns out we were badly off the mark with the tuning, but we're pretty confident in our numbers.
As far as composition goes, I can't promise that every possible composition will be able to get Gold. (Apologies in advance to the prospective monk/monk/monk/monk/monk groups out there.) Every composition will be able to get Silver (subject to some fairly basic ground rules such as "you have a healer"), and every class should have multiple viable group makeups in which it can obtain Gold, assuming masterful play.