I'm pretty sure a decent lawyer would still tell Magi to avoid any and all conversations with anyone who could be a witness in the litigation that has already been filed, and as a precaution, any witness or plaintiff in any future litigation. Also, lawyers tend not to take anyone's word for something, regardless of how many times they say it publicly, until they have it under oath.
As to the SA, while Sean may not have any intention of suing DUT or Pete Werner or John Magi, there may be others who could be otherwise inclined, or there could be other allegations that are still within the statute of limitations for criminal charges. Again, any conversation with the victims or potential witnesses could include simple admissions of knowledge that a defense lawyer does not want to find out about in a deposition or trial testimony. Even the slightest admission of knowledge of any potentially criminal behavior by Werner, even couched in an simple apology, could be enough. There could be additional SA allegations, hostile/abusive work environment claims, wrongful terminations, even the possibility of tax fraud claims (there seemed to be an awful lot of under-the-table payments floating around, with some confusion as to who was working for who).
Between DUT and The DIS these guys have created such a cross-pollinated spaghetti bowl of entangled crap that I'm really surprised that they let the remaining team members participate in this past weekend.