It's a very nice buck in my opinion. Had you shot it, you would have shot a very nice buck. SInce your granddad shot it, congrats to him. No reason to have regrets with a buck like that. If he's happy with it, that is what is important. Deer management is not a bad thing. UNLESS it begins to take the enjoyment out of hunting. Then it becomes a problem. So, if your granddad is happy, then it's a great buck.
-Jake