It is impossible to judge a protocol when we have no threat model/what goal the protocol is hoping to acheive. I think we should agree on that first, before discussing the protocol. More specifically, which of the following OTR goals we are aiming to acheive: 1. Participant Authentication.2. Room view consistency.3. Message origin Authentication.4. Forward secrecy.5. Transcript Consistency.6. Deniability.