It look like Nick is back in some of the sketch clips. The one in the video thumbnail on the left is one of Sam's recent creative collaborators. I forget his name but he is a one of Trump's Chosen People with a master's in philosophy who runs an avant-garde literary zine of some online repute. He has been in some of the Hydewars videos where he chats at length with Sam about philosophy and academia.
I don't know where Charls stands right now, maybe someone who watches he streams regularly will know. Last I heard, Sam was offering to pay Charls for future MDE collaboration as additional incentive