Riot, what is the reasoning behind being able to vote on only 3 cases per 24 hours? I'm sure a bunch of us 30s would enjoy providing some more help in Tribunal than that. After all, I'm assuming that there are far more reports submitted than 3 cases per 24 hours per actively participating lvl 30 player.
I suggest opening up Tribunal to unlimited voting, but of course not being able to vote more than once on a previously reviewed case (unless it was skipped.) BUT, I'm completely fine with leaving the IP rewards only on the 3 cases per 24 hours system. Meaning, IP rewards are only given based on the system now, and any Tribunal participation beyond that could be considered volunteer work that doesn't gain any additional reward.
Who knows, maybe you might end up feeling like giving small RP bonuses or IP boosts to long term, accurate Tribunal volunteers.