I also am a big fan of cooperative games, so that may be coloring my glasses a bit.
Possibly.
I'm a big fan of co-operative games
that have a traitor. So, not quite co-operative... yay, finally played BSG as a Cylon on the weekend!
However, I do hear what you're saying. I agree with a lot of what you say. I have a feeling that because I'm very attuned to solving the sort of puzzle-game that Pandemic is, it isn't as impressive to me as it would be to many others. (It's possibly the one type of puzzle-game that I am attuned to... anyway...)
That said, if Agricola wins, I'll be the first one to cheer. It's a fantastic game, but (I know, cry heretic) I think the family version of the game is the better version. When the occupations and minor improvements get added in it makes it that much harder for a new player to jump into the game, and I'm still not sold that they add anything significant.
I don't think you're a heretic. Agricola without the cards is a very impressive game.
My reading of what the cards add is this: they provide a way to vary your play of the game. They reward you if you step aside from a "rote" way of playing the game and concentrate on areas that you wouldn't normally take. So, if you normally are the grain farmer of the game (that's normally me), if you get the Spindle, you can play a game as the shepherd instead and be rewarded for changing your choices.
My preferred way of playing with the cards is using the draft format, btw.
However, the level of complexity (and consequent loss of balance) the cards add to Agricola is definitely something that newer players should avoid, and, for some, continue to avoid. The game is good enough without the cards; the cards keep the game from being "solvable" in the same way that "Puerto Rico" or "Caylus" have been solved (to a large extent).
(Consider the effect the order of power plants arriving has on a game of Power Grid...)
Still, both Pandemic and Agricola are rather exceptional games.
On an unrelated note, I just want to say I'm honored to be involved in four of the nominated books. I'm just disappointed I'm competing with myself three ways in one category.
Oops!
Cheers!