Some of the worst band mixes I've ever heard on live TV.
Why such bad mixes?
While I cannot give you an absolute answer, I can maybe provide some insight.
Firstly, these are one off live events, usually with little or no rehearsal. With a lot of "moving parts" talent schedules and production limitations it just isn't going to be as tight and polished as everyone hoped for.
Then as we sometimes say in radio: TV people only notice the sound quality when it isn't there at all". Ok maybe that is a little harsh and with HDTV and lots of high end sound in the consumers living room there is a demand for higher quality audio then was provided in past decades.
Another thing to consider: the audio mixer is answerable to a production director who will insist that whatever visual image he has switched to it prominently heard. Most of the time this is going to be the vocal. you have probably seen it yourself, when he switches to drums or guitar, suddenly that instrument becomes prominent. As a live sound guy this will bother you but that the way its gonna be.
The radio feed however, was fine. it was delivered on 2 separate satellite feeds. The break, liner, end of show,and ID cues were automated, in other words the radio station got relay closures that told their automations systems what to do.
I didn't listen beyond getting the show started as i was doing prep for a concert the next day but I can review the audio logs if needed. As we didn't get any complaints from the audience, (with a 100,000 watt radio signal) I'd have to say it was just fine.