Affirm. He CC'd some people on his email that he probably shouldn't have. Unless you know something more about the situation than was given out in the presser. Probably people like skippers of the squadrons, his staff that prepared the memo, CO's of other boats in the strike group etc would be my best guess; SECNAV didn't want to elaborate. Definitely something worthy of some sort of informal reprimand/ass-chewing; not in my opinion worth relief.
I've not been a CO, never will be, and thank god. I've seen enough decisions made regardless of the career implications, and enough made because of them. Bravo to those that make them regardless if they have their people at heart.
All that said, if he did actually leak it then the SECNAV should have said as much instead of alluding to it and then backing down.