While I was hoping a fork wouldn't be necessary, you make some good arguments for it. Unfortunately a lot of users are still on SteemIt.com and may unknowingly continue using the Justin-controlled chain.

On another note, I hope this fork will be done in the most democratic way possible. In my mind, we should be voting on it, like what would happen on Tezos or Telos. During the transition I'd also like to see some other changes, like vote decay for witnesses and voting for these types of protocol upgrades.