I'm sure I wont be the first person on here to say the outdoor shots look totally washed out, even blurry, not only overexposed as you put it, as the optics are responsible for these poor shots, not the light metering. The only decent ones were those aquarium ones and even the top two of those looked pretty bad. The telephoto shot of the church is so bad its akin to cameraphone quality optics.

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Send it back, get another one, re-review. Or maybe just de-grease the lens?

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BTW How the hell do you guys get away with photographing police vehicles and officers!? Albeit an extreme close up in this case. "You're knicked, terrorists!"

Either the lens is spectacularly dirty for the cathedral shots, there's condensation inside the camera, or that lens is dismal. None of those options are overly reassuring.

That said a bit of wide radius USM perks them up appreciably, as you might expect.