The biggest gripe that I have is that for games like this, best out of 3 or best out of 5 sets are a must. It's very difficult to beat everyone100% of the time in every fight, but in a set, everything is more consistent. Winning 3-2 against a pretty good player could still net you a loss of a good 10-20 points.
There should be sets and non-ranked duels, but it just depends how much work it is.