Excellent points Eric. Maybe I am expecting too much from trek leaders.
I guess I should expect more from someone who claims to be a workshop leader than just a trek leader. In my mind, a trek leader puts you on the right scenes at the right times of day. A workshop leader does the same, but also helps you capture the scenes from both a composition and lighting standpoint. An excellent workshop leader would know my equipment and be able to tell me nuances that lesser humans could not tell me.
I should also expect the fee for a trip to reflect what type of trip leader I have with trek leader at the low end and excellent workshop leader at the top end.
I will have to fine tune my trip evaluation criteria and my pre-commitment questions for the leader.