I definitely agree on the view that it's best that the game is hard.
I never enjoy playing against a dumb opponent, but quite the contrary. The more you are forced to think of strategies, the tenser the game, and the most satisfaction once you beat a given scenario.
I can't wait for this! I ordered my first on Amazon.uk (~£20), but knowing how they handle new releases, I have also ordered another copy from iguk (~£29).