Having read the Oct 2017 report, it appears reasonable to charge homicidal negligence.
17 guys are dead because officers and crew were not doing their job.
http://s3.amazonaws.com/CHINFO/USS+Fitzgerald+and+USS+John+S+McCain+Collision+Reports.pdf
NOT surprising to me, and old SWO, at all.
The Captain can delegate authority to the Officers below him, but he cannot delegate the responsibility for the safety of the ship.