Was there a post by theymos stating he has actually taken any legal advice on any matter related to the forum? Maybe he has but I cannot recall reading any post where theymos made that claim. As for his reservations about allowing mixers in the forum, I doubt he will change his opinion regardless of any legal advice he could receive (though it might be beneficial for him to at least have those discussions).
I guess my main point is that aspects of theymos's chosen framework seems a bit overly conservative, and it may be good for him, the forum and forum members if he might be able to potentially seek the opinion of more than one legal counsel, to the extent that legal counsel might be influencing his level of chosen conservativism in regards to timelines to potentially revisit these kinds of matters and potentially if there might be some lightening actions that already could be taken based on our obviously having a less hostile environment in regards to mixers and various related third-party (internet communication services) liability topics.