Lenny Pescatore's role is too improbable. A "goombah" like him would simply not have made it through law school, much less passing the bar exam. Notwithstanding that, it was also incredible for Jimmy to have stood up to a guy like that; Jimmy's a straight arrow and his character may have the moral moxie to handle unpopular causes in court, but in terms of the physical confrontation, it was highly improbable.
The receptionist role was too flat and stereotyped. It would be more interesting to see how Jimmy handled himself in court without Eugene, Eleanor, or the others backing him up, and I'd like to see him go against Alan Shore at least once.