We can all hear our own Ding when we hit the sweet spot but how about letting MP opponents hear it too when someone else hits the Ding on their shot? This means you can tell when someone else has made a good shot, or not, so you will know whether their accuracy is more down to skill (Ding) or luck (no Ding) and you can congratulate, console or 'rib' them appropriately.
I always wonder about this when I'm playing against others, are they better than me or just getting luckier? :)
EDIT: Following the replies below. How about showing just part of the opponents swing meter, as shown. You could see how well your opponent hit their shot based on this without it giving away too much info about how they set the shot up i.e. power and direction selected.
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