We tried the 1st and 2nd quest tracks with 5 players last week. We were starting a 4 player game (w/ 3 Heroes each) last week and someone showed up last minute. Rather than make him sit in the corner, we 'dealt him in.' So two of us gave up a Hero each for a total of 2 Players- 3 Heroes each and 3 Players- 2 Heroes each. We didn't make any changes, just drew an extra encounter card during staging. In my opinion it scaled appropriately for the 2nd quest track- due to the number of X Player effects, but the 1st track was not very challenging.
Does anyone have any opinions/experimented with whether the game scales appropriately for say 5-6 Players?