The way I see it, no way. Not my kill to decide with, but I'm not one to add antlers after a kill to make a bigger/more appealing mount. I'll mount a deer just as I find him. I would trade capes for a ruined cape, but antlers aren't changed...unless it broke after the shot and I found the antler tine (like you said).

Although admittedly a stretch, why not add a droptine ora sticker here and there while you are at it? Just the way I see it, doesn't matter one way or the other. It just boils down to how you personally feel about it.