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I also am using the same set up. D7000 with the 80-200 2.8 . great photos you took with it. question for you. are you holding it freehand or are you using a Tri or monopod?
Most of the shots I have free hand are very very shaky and out of focus.
You might be shooting at too slow a shutter speed. Keeping a minimum shutter speed of 300 or 400 should improve your keeper rate. Of course, developing good hand-holding technique will also help.