Reserving this post spot for Anticheat research information and circumvention techniques. Will edit this post with everything when I have it all ready. I will say this, I believe it is still possible to use modified Assembly-CSharp files.
Update: I have lightly documented all the anti-cheat updates that came in on Update 7/8. It is 3:30 AM at this moment, and I will do a proper post/edit of this when I awake with all the relevant information. I can tell you right now that we will definitely be able to continue to use Assembly-CSharp edits/modifications, and I will have a Proof of Concept when I wake up and edit this post with information.