You claim that if all merchants, exchanges and users are moving to your chain then it will be the main chain even if it has less computational power.
But the majority of the hashrate can now perform double spends on your chain! They can send bitcoins to exchanges, sell it, extract the money and build a new longer chain to get their bitcoins back. Are companies like Xapo and Coinbase really so stupid that they would go along with this without complete consensus? I dont think so.
If the miners think that Bitcoin is doomed because of this change, then this is what they will do to maximize their profits.
But you could always roll back the blockchain to revert the double spend and have you and Gavin do a checkpoint on every block. Better yet just sign the blocks yourselves and you wont have to worry about that pesky mining!
Or you could change the hashing algortihm... Oh, but wait... so much capital has gone into the mining industry so this aint gonna happen.
The sheep of reddit who worships Gavin and Hearn really need to understand the importance of consensus...
Nothing of this is obviously going to happen, but just the fact that Mike suggests it is painful to watch.