Lets just all agree and do it, there really is no negative to kicking it up an extra mb.
No. There are no positives to this aside from a increase in capacity. Segwit does that and so much more. In the battle between Segwit and 2 MB blocks, Segwit is the clear winner by far.
It will give people experience on hard forks and a mutual one is a good place to start, to be honest I am pretty sure we all know there will more hard forks in the future.
That's the only reason that Garzik is supportive of Classic. He wants "us" to have experience with hard forks and I don't mind. If you disregard that, he does not have a real reason to support an implementation with a non existing development team (exclude Garzik and Gavin).
I have been so done with the block fight I don't even know what segwit is and why it can't work with 2mb blocks, if it can then why not both?