Is James Franco the Best in This Movie?

Seth Rogan wrote this movie and assumed that he would be playing the drug dealer. It was going to be James Franco would play the lead but they switched it because Franco was so good as Saul. I think another version of this movie that would be pretty good is Seth Rogan stays the drug dealer and Danny McBride is the straight man. But either way, I think that Danny McBride Rogan buddy cop's a little meaner, a little sharper.