You paid a lot of money, so I think you deserve your money's worth. However, slanted keys are pretty standard on most Mac notebooks I look at at the Apple Store. And if the scratch is super tiny, that could even be your fault (according to them). I think if you didn't return it instantly, you should just be happy with it... that was your acceptance. If there is a ding or severe scratch, you should immediately call Apple and tell them, so I would expect Apple to put up a little more resistance this time. However, maybe you just got around to opening it???
In all honesty, I would return it... would have instantly. I would expect my money to buy me a "near perfect" model. However, I wouldn't call crooked keys a problem... easy to pull up and correct by yourself.
Good luck whichever route you go.