Genuinely I would love the ability to switch off the commentators, but keep the natural sound of the crowd. This would be magic for football and tennis I think too - snooker and F1 I think it needs commentators (the snooker voices are quiet and relaxing and helps you sleep), and cricket they know to shut up and have ample pauses between comments
Football these days is often just a constant stream of noise from the berks on the microphone - I can see no financial reason or difficulty in BBC Red Button offering this service. It would give more of a match-day feel to the free streams of Everton!