But did we see him interact physically with Maeve? Everything up unitl the attack mirrored the Charlotte encounter. Did he stop Maeve because she was about to puncture the illusion?

Yes, but he also has five seasons experience scoring the Machine and Samaritan, among others, on PoI, as well. So this stellar work is no surprise!

I’ve had a perverse hope all season they’d throw that in as a absurdist Easter Egg. And this would have been the episode:
Senator Keene prances in, and tosses out a mock sincere “How ya doin’, Agent Blake?” She spits back, in a glorious conflagration of Kartheiser and Smart, “Not great, Joe!”

Given the love the show’s already shown for Roxy Music, “Dance Away” would be epic. Especially the spin they could put on, “you’re dressed to kill, and guess who’s dying”!

Until Philip’s meeting in the park, that was the most tension I felt all episode, wondering when Mail Robot was going to interrupt Stan, at the worst possible moment.

You must go on.

Kevin Chapman, of course (just to confirm it's as much a stealth PoI spinoff as a H2H reboot. With Amy Acker voicing their computer 'assistant' ;-))