The real Jimmy
Maybe just maybe Jimmy was sincere last episode or he thought he was, that's why he was so floored by losing. When he crushes Esposito's hopes he cries, I think, because his own hopes for fairness have died as well. This is full Saul Goodman/Slipping Jimmy that is why Kim is so floored. Not only by the fact she was fooled by is portrayal, but also because the Jimmy that hopes to be treated fairly is gone. Slipping Jimmy is all that is left.