What I'd like to see in any online game is an option to log the made hits. Countless times Ive wanted to know what blew me out of the sky / ground / water and there's no way to know the real amount of hits or placement of hits.
Same thing with enemies, sometimes you score a huge amount of (what seem to be hits) with no effect to the opponent. If you'd be able to verify the shots then you can raise valid questions as to why the enemy doesn't go down. Cheat detection is one applicable usage.