I dislike it when people like you try to paint segwit2x as a "hostile" attempt to take over Bitcoin. It was not. A few confrontational segwit2x supporters made it look this way, but in reality the people at the center of the movement genuinely cared about simply making Bitcoin scale.
Segwit2x attempted to replace the existing Bitcoin software and network with something the entire current development team thought was a terrible idea. It relied on the premise that the reason almost every person who had experience deploying changes to Bitcoin opposed it was because they were part of a secret conspiracy to cripple Bitcoin. The software was developed by a single guy, was to be deployed on a ludicrously tight schedule with no real code review, and had bugs that would've caused chaos if t wasn't cancelled at the last minute due to opposition. Hostile takeover seems accurate.
Oh, and BitPay (the payment provider Steam used) tried to trick users into switching to it via a blog post telling them they needed to upgrade to it because of Segwit and their money was at risk if they didn't. Every user who followed their advice will now have a client that doesn't work.
"Everybody should sign this paper and promise to use btc1 instead of bitcoind. We have a guy on payroll who is both project maintainer and lead developer of said software."
Yes, I can see how some people might see that as a bit hostile. It's as if IBM went around all the Fortune 500 soliciting signatures to swap out all Libreoffice for Openoffice.
Except perhaps Openoffice is a healthy project in comparison.
Is Armstrong involved in it? It's an attack. I have nothing against the business of coinbase. They provide a service and are compensated for it. He needs to just butt his head out of technology governance.
See also a longer explanation I wrote at: https://www.reddit.com/r/btc/comments/7508mh/comment/do7umhy