Prior to the latest patch, I was able to pause a Custom Online game so long as it was just me vs AI, but I find that to no longer work; the patch notes didn't indicate this to be intentional, and I've been reading the forums to try to see if there's any indicator it was, only the line "Fixed an issue where paused AI games were not actually paused" in the notes gave any hint of modification to the behavior therein.
By all means, if this is intentional, it is what it is, I was just seeking some clarity.
Personally I loved being able to play Custom Online vs AI and pause as needed to deal with random IRL stuff, and I avoid playing Offline because I like earning XP / Skulls for my time and efforts.
That said, I appreciate all the hard work, Relic team, and I'm looking forward to your continued efforts. Thanks for taking the time to read this (and hopefully reply!)
I can't speak for everyone, but my crew and I are greatly enjoying this latest entry to the series.