I’m having the same problem. It seems like every week there’s a new issue, whether it’s the sound quality, playback errors, video jumping back and forth in time, or now only having the option to watch the full game on some games but not others.
Pair all of that with the questionable design decisions like having scores on by default (what sports fan would want that?!?) and hiding the option to watch the full game where nobody can intuitively find it, and it’s beginning to look like Apple TV is going to be horrible for the MLS.