Pretty sure with those two dead no one even was aware this happened to cover it up, since four of the five people there are dead, except maybe eventually Jiraiya when Nagato must have told him his history.
And this show doesn't even have many of them and many of them do very different work for real studios like NYAV Post and Bang Zoom.
I think this dub is pretty good. Sure it's got a big enough cast of NPC types that there are some iffy shopkeepers and stuff, but I think most of the focus characters have been well done.