Well Horizon Divers liability in this is very clear IMHO as is Mr. Sotis's. Mr. Sotis would actually have a better defense if he were to contend that he was pulled out of the water first because of a Medical Emergency rather than it was simply more convenient for the boat to pick him up. He almost certainly was having a Medical Emergency. Type 2 DCS almost certainly. What instructor gets out of the ocean before a student for "convenience".? None. As a matter of fact in a class I took a while back, I invited my instructor to get on the boat first since it was closer to him. He refused. On the boat he said " The instructor is always last out of the water." Contending in someway that Sotis is being made a scapegoat is ridiculous. US law is clear on the relationship of a teacher and a student broadly falling under "en loco parentis". Somehow contending that Mr. Stewart had the same relationship with Sotis as previously fully certified students doing a group dive without instruction at Truk is a false equivalency. And as a matter of fact, your admission of seeing other divers "bent" shows that Sotis knew the GF's he was diving could be dangerous to others. Somehow contending that Mr. Stewart's "advanced training" somehow altered that teacher-student relationship/responsibility is contrary to the guidelines of every certification agency on the planet. Somehow contending that Mr. Stewart mentioning a "propensity to pass out" in a book written years ago is somehow a "medical condition" that he tried to hide shows a reckless disregard for the truth. A medical condition is diagnosed by a physician, not by a patient. Clearly someone is trying to use this passage in a book, as means to discovery for Stewarts personal medical records. Good luck with that, because his "propensity to black out" in this case was exactly the same at Sotis, who had no such reported propensity. His Medical Emergency was almost certainly the same Medical Emergency Sotis experienced. Type 2 DCS. Also if the boat had pulled Mr. Stewart out first, we almost certainly would be having an almost exact opposite discussion of Sotis's estate suing Sharkwater Productions and Horizon Divers. He's lucky to be alive.
This is a lot your opinion, like Fox News. You may get out of the water after your students, I may get out of the water after my students, but you have to know Peter. Peter is a bit of a narcissist. Peter wouldn't ride on my boat because it wasn't nice enough for him, he rarely did liveaboards, and then they were only the most very POSH. Although Add helium did many trips with me, some routine tech trips to normoxic depths, some to 500 feet, Peter wouldn't be caught dead on the Spree. So I wouldn't find that Peter exiting the water first to be abnormal at all.
Peter was not acting as Stewart's instructor on this dive. Or any dives on this trip. Peter was very clear in the role of Safety diver, as was Claudia, their roles were spelled out on the studio call sheet that was prepared for that day. You may or may not have seen the call sheet, I believe it is in evidence, but buried somewhere. I have dived with many of my students. I certainly dove with them in an instructor role, but they were my buddies and employees after. I still dive with them. I do not take responsibility for their dives, aside from a buddy role, when we dive together. I am a lousy buddy.
You are correct that medical conditions are diagnosed by physicians, and Claudia is one. But the patient (Student?) has to come to the doctor complaining of a problem before the doctor can diagnose it. If you don't get this about student medicals, well, you need to go back to that module in your instructor manual. The medical form is there to protect the instructor in the event that the student has a medical condition that wasn't disclosed on the medical form, or has disclosed such a condition, shifting the liability for the student to the physician. Dive instructors are not typically smart enough or trained to evaluate medical conditions, so the WRSTC makes it easy for the instructor to escape liability. As in this case.
It's cool to hate Peter, just like any narcissist. They don't care, or understand the general population's hatred. But if you're going to hate on Peter, hate on him for something he actually did. He didn't kill the Stewart kid. The Stewart kid had every opportunity to not die, and failed.