I think it was fine as it is. I am sure the show could be expanded.
My overall impression
The show was funny, poignant, and thought provoking. In a very clever and sensitive way it presents emotional and sensitive material in a light hearted way. The songs, melody and lyrics were well done. The acting and musical performances of both Lindsay and Griffin were terrific.
In summary a short compact well written and performed show. I truly enjoyed that they were able to make fun of the phony self help gurus.