I dont have a problem with bull cross championship/classes, but the mistake some lurcher shows have, is that they include the winner in the line up for champion lurcher. Thats fine unless, and this happened at a local hunt show some time ago, the winner of the smooth dog over 23 was a bull cross, the winner of the smooth bitch over 23 was a bull cross. They met in the bull cross class where the dog beat the bitch. They were both in the line up for champion lurcher as they had both won the smooth over classes, where the bitch could not win because she had been beaten by the dog.
My point is, e