Not going to bother suggesting details, but like the concept of a tier system, since I think most people who spar mentally divide people into tiers. Beating someone from a higher tier could give you more positive positive points and vise versa to keep it more skill based. And you could have something in your profile saying your current tier, so you could say you were an SS tier sparrer or whatever and feel all badass.

From the perspective of someone who barely plays and might play more if sparring (or events system) was improved, neither the old boards or the new boards made want me to spar. With the old board, I'd spar a day, get in the top fifteen or so, and then not have to do anything to stay there. With the new boards, I have absolutely zero chance of ever appearing as it requires constant activity.