Negative, I dont think it was a pile of crap at all. Removing it was a stupid decision which I hope they re-add to the c1 line up. Was just watching today, nfl on one screen, youtube on the left and can switch audio. You can watch either hdmi or cable tv or whatever. This is on a 2018 B8 55" too. Sucks they removed it on the CX line up.Yeah definitely removed. But don't worry, it was a huge pile of crap even on the C9. It would show you two 16:9 inputs, of which one had to be the TV signal. Then those were shrunk down to the middle of the screen with some constantly shown UI elements.
It was pretty unusable. Which is a real shame because a proper PbP mode with splitting even just two inputs horizontally or vertically would be just awesome.