I think balance is important, but not with the emphasis or the definition as is often used in other forums, so I am always cautious when people raise it. I think an over-emphasis on balance has hurt D&D 4e for example.
But I agree that "tactical" balance is more important where you are spending more time in a gamist approach. (Perhaps other sorts of balance, such as time devoted to characters, may be more important if the game is not gamist focussed.) I agree that the most gamist style approaches a board game, and that is why I suggest making sure the moves are interesting or have a basis in fiction otherwise you might as well be playing a great boardgames.