Tropic Fish is toast in that they did not follow their own procedures.  Why would anyone have any confidence that the so called corrective changes they supposedly have made will prevent something like this from happening again.
All they had to do was to follow the procedure they already had in place. 
I truly hope that no one develops Hep A from this incident but that may be wistful thinking on my part.  
The incident with Genki Sushi, the local distributer , Koho Oriental Foods, and the Washington State distributor, Sea Port Corporation which sickened a whole bunch of people and probably caused one  fatality is still in the early stages of
fact gathering by the Schmidt law firm out of Dallas, Texas.  A lawsuit will probably be filed very soon and the probable civil judgment an or settlement will no doubt be in the millions and possibly none of these companies will survive.
Tropic Fish may find themselves in a similar position, as well as the other businesses that sold the tainted ahi.