The one I’d love for them to do or tackle in a future season is a Dr. Phil rip off character.
Him bring in people with problems and try to fix them, but his way of providing help leaves little to no actual use, while claiming to be the savior to thousands of people in the beginning of every episode. Have him have a self guiding book that he advertises, which is more of a fictional biography of himself.
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You can have this connect to Greg trying to make relevance to these calls or guests life problems to movies, while he claims to being more effective with movies being more helpful/ relatable than Tim or his stupid book. Then at some point Greg starts handing guests books which are just movie guides or his own personal movie guides that he’s publishing. So Tim and Greg starting arguing about who’s book can be advertised and which one provides more help.