Yes, there appears to be consensus (or at least defeated lack of opposition) to demoting Washington to a place boundary. I concur with the 2-4 portion of Washington, DC replacing the 2-4-8 scheme.
I’d like to leave the 9-10 levels aside from this discussion since it’s not something we discussed in this thread and the question of DC ANCs are probably similar the disagreements over sub-municipal boundaries in Manhattan. I don’t think this thread can be cited as evidence for their inclusion.