And will some of them start changing their minds a little faster if the next Core release goes through with the proposal to disconnect nodes signalling 2x?
That pull request has already been merged into Bitcoin Core. It will be part of the 0.15.0 release. This means that if you run Bitcoin Core 0.15.0, you will be disconnecting all segwit2x nodes.
Considering the diversity of node software out there, I'd assume there probably won't be enough 0.15.0 clients to cause sufficient grief to the 2x miners. I'm guessing they would still be receiving enough transactions from other nodes to "keep up". Will be an interesting exercise in network topology and propagation to find out for certain, though. How few compatible nodes is enough to stay current until the fork? Will there be gaps in coverage in certain regions? It's going to be educational if nothing else, heh.