I definitely go at least once to every class in which any of "my" Scouts are participating. I write a detailed analysis on the asessment form at the end of Camp. IF any instructor is passing over requirements, the Program Director, the Camp Director, my D.E. the Council Camping department, and if need be, the Council Executive will hear about it. If you get a Scout with a questionable Partial, have a real, honest, discussion with him.
Here's one for you: For an Able requirement in Sea Scouts, one must do the requirements for Lifesvaing Merit Badge. I had a young lady Sea Scout come to me to do that.