Notable: Google Home can no longer set timers and does not understand what “stop playing” means. It’s basically only usable for asking for music to be played since it has declined so heavily.
I just tried to reproduce your comment. Google home set a timer for me and play/paused my TV (chromecast with google tv) I don’t have streaming music to test it on. I do agree that the quality of Google home has gotten terrible though. It takes a lot more prompting to do simple things and has stopped some scheduling tasks as far as I can tell.
When I ask it to set a timer, it tells me that it doesn’t understand me. If I ask it to stop playing, it tells me that it doesn’t understand me. I have to just say “stop”. It also used to transfer whatever you were listening to between speakers, but cannot understand me anymore if I ask for that.