One thing I'd love to see change is Blue Moon before games. Either play the whole song, which I'm sure most of us know the words to, or play it once then just play the music (slower) to let it go around the ground so it's the fans you hear. I hate how it ends with the happy clapping fast part, which we'd never sing otherwise and which ends to it fizzling out and complete silence before fans start the next song. You want the anthem to ring around the ground and end in feeling completely pumped up. It just doesn't work having the quick version which inevitably leads to silence.
Or stop doing blue moon and do hey jude and let that ring round.
The whole idea is to get everyone singing. Having the music helps people feel confident about joining in, then you could cut that so it's just the fans which gets the goosebumps going and you want to leave it so that it flows into more singing. As I said, the current setup just leads to the fast part where it just fizzles out.