I think the problem is we are treating the medieval game mode the same as other gamemodes like KotH, when they aren't made for the same audience.
Think of it this way. You get Hollywood blockbuster movies designed to appeal to as many people as possible, aka casual movie goers.
Then you have your 'high-brow', arty or indie films not made for mass appeal. These are our 'competitive' equivalents.
And then you have guilty pleasures like 'Team America'. Low brow, stupid, but funny. Also not for mass appeal, just the few people who like that sort of thing. Medieval mode is TF2's 'Team America'
I get the impression that Muddy is trying to compare Medieval mode to say 'Citizen Kane'. Yes, objectively, when you compare medieval mode to pretty much everything else in the game, is soo fucking shit. But it wasn't trying to be the next 'Citizen Kane', it was trying to be the next 'Team America.' They are in different leagues, made for different people.
Now my original point that sparked all this, was simply stating the principle that if Valve are going to add any new gamemode, they have to give us more than one map to play on. No matter what your taste in movie or gamemode, playing the same map or watching the same movie over and over gets tiring.