Now that draft has been making somewhat of a resurgence, I've found that yorick isn't the most OP champion in Dominion. For one thing, an AD malz played well will fight yorick pretty hard, and at certain points in the game will beat yorick. If the top team has the time to spare for a gank or two that succeeds, then AD malz will beat yorick in lane. Now, in the last DD, our AD malz didn't do so hot vs elalya on yorick, but he did very well under the circumstances. If our team had done better top and been able to gank for him more, then its entirely possible he would have won, as he did in the first round vs jiggly the puff on yorick.
yorick is strong, no doubt, and beats a lot of the other bot champions. However he is not the most OP champion on the map, nor is he unbeatable. I would reserve the title of most OP for kassadin or jayce, as those two are just ridiculous.