The captain has been relieved of his command as a normal part of the process. I have a feeling he will never get a command again. I say "good."
He's WAY too valuable a person to lose to a normal career path. He should come out of this with a significant berth at "the trade school" (Annapolis) so that he can train others how to train a crew up to dealing with something like this.
He may have screwed up badly by running maxed out in less than perfectly charted waters. That's the luck of the draw and he probably knows it. On the other hand his performance, and the apparent performance of his crew, speaks volumes about his basic abilities.
He may not be the best choice to skipper a boat. Ironically that may make him one of the best to teach about it, and it might even make him spectacularly qualified to have his own flag and command others who actually drive the boats.
Rickover would never stand for it. It will be interesting to see how this one plays out as a view into the current Navy. This all assumes that my suppositions about what happened are even close to reality. Time will tell.
Some good thoughts. You might want to add that the move up for a sub skipper is very limited anyway.