I guess I'm classified as one of those "nektoids" who always come to the defense of Nekton, but in this case there is really nothing to defend. I can say that it seems unusual that the response from the office was so minimal. I worked on the Pilot for eight years (and in the office for two) and the one thing I remember is that when there were problems like these the office (and the owner) were very quick to respond.
Burnout does happen. I was on the boat for eight years (and in the same cabin for all of them) and I saw hundreds of instructors come and go. It also seems to be a cyclical thing. The average length of employment on the Nekton boats has always been about six months, but there were times on the Pilot (late 90s come to mind) when many of the crew had been there for years (Capt. Ephey, Chris, Paula, Mikey, Kevin, Jerra, Arminda, myself) and it showed. In all that time, I never felt "burned out"--there were many days when I worked on the divedeck as an instructor and in the wheelhouse as a captain and thought to myself I can't believe they actually pay me to do this! My personal opinion is that hiring a younger crew causes problems, as they tend to want to move to new locations and new surroundings after a short period of time. The best crews we ever had had a strong nucleus of older, more mature crew members which brought stability to the crew and had strong work ethics.
I was the one who originated the slide shows (I did 5 per week--coral reef ecology, Fish ID, reef critter ID, Sea turtle conservation, and photo contest/trip video) and I enjoyed doing them every week. It saddens me that these are no longer being done, but if I know the owner, this is a temporary problem and he will have new crew trained up to do these presentations.
I'm sorry that your experience was not a good one and I hope that Nekton management responds further to your concerns.