Yeah, you and your friends just need to resign everything. It's not that hard.
People don't want to lose their data on a key change. So, we need migration. It's a must have. And maybe PubKey PoW relays is what will get them done.
Discussion
What would a regular note look like, before and after a migration like this? Can you provide a real example? Curious what it looks like, and confused as to why if you're having to recreate a note as though the new key posted it, why providing a new POW value is not an option at the same time. The pubkey, sig, id, etc all change anyway?
With this tool, you can offer PoW pubkeys. But we don't have the migration tool yet and you can't assume we will have until somebody makes it.
Right now, PoW keys are just a cosmetic benefit.