If anything, we should get the blocksize to the largest rationally supportable size
This is exactly where reasonable people differ.
That is a key word right there "reasonable". I certainly haven't had any great epiphany as to how to choose the correct size or how to make it a reliably updated thing. Predictability and anything that removes human consensus making from an ongoing process is what I would favor.
(MP argument).
That is btw pretty much Wladimir's view. He's not going to back any change that doesn't have human consensus. So you either have human consensus or, removing it from the process, no changes at all.
Is this your position too?
No, I've already said I'm in favor of an immediate modest increase to 2-3 MB (and generally only keeping up with hardware technology unless there are other changes to the software that improve its ability to scale decentralized, which so far there have not been)
Which then leaves Monero as a lifeboat where I recall some recent post about it having massive scaling capacity, no 1MB rubbish for them!
The Monero scaling is somewhat similar to BIP100. I consider it very much an open question how that will work out (perhaps okay, perhaps quite poorly), and I wouldn't want to impose something so unproven on Bitcoin.
This is pretty much where I am also.
Any hard fork presents an edge case where unusual risks are presented. This is especially true when these hard forks are so rare. There is no practiced resilience to the sorts of things that creative minds can cook up to exploit events.