re: Mature whitetail with one side of antlers "deformed", what would you do?

If an injury to the animal caused the repeated malformation of the antler on that side, he has the genetic make-up to be awesome. The injury made him inferior not his genetic make-up. Now, the question is was it caused by injury? We will never know, but I wouldn't shoot him unless you have a lot of super bucks (150 inch plus) running around. In a non high-fenced environment you can't control the herd too exactly, so I would try to keep this possibly exceptional deer on my property.