Really? I think it all comes down to how he actually judges them, because aside from that he shouldn't be that different from Decim. Sure he's rude and brash, but all they end up doing is getting the players to shit themselves in a death game and think about cheating. How they interpret what they see and make a sound ruling is what separates a good arbiter from a shitty one. As far as I've seen, Decim's lack of insight makes him pretty unimpressive. He takes too much at face value.
This episode was after all a comedy one though. To make a point about how unimportant the ruling is, the producers didn't even show the final ruling. Without that, I'll withhold judgement about Ginti but he doesn't seem particularly bright.
I want to see how the bigshots like Nona or the Lotus guy do things.