I think Valve should really make the current „Betas“-Feature more prominent, and rename it to „Versions“ or something. It should* be pretty easy for Firaxis to just offer an old, cross-play enabled version there, while updating the regular version more frequently on PC. That would make disabling such features unnecessary.

I’ve seen only a few developers actually making use of „Beta“s in that way, but I think it would be very useful in cases like this.

* there could, of course, be other technical issues preventing them from doing that, which only their developers know of