Forget what anyone else thinks - do YOU like his ears how they are? Really think about it. I mean, reallyyyyy think about it. Are outside influences conjuring up in the back of your mind and making you think his ears need to be trimmed?
That said - personally, I wouldn't trim or correct a dock at this point unless it was truly needed because it was bothersome to the dog. While considered a "simple" surgery, it is still a surgery that requires anaesthesia and thus has risks. I try to have my dogs put under as few times as possible in life. Which sometimes means none as I don't neuter.