Animatic Problems and changes

From working on my animatic I worked out that certain shots were too long or needed to be changed. These shots are:
shot 6 - From 11 seconds to 8
Shot 19 - from blank black bakground to a starry sky
shot 22 - from 12 seconds to 8
Im going to download a better version of the song as it cuts out the last word from the song and I had to cut 4 seconds of silence from the beginning of the track.
Alot of my shots seem quite long but some are being drawn onto the shot or have the characters moving which was hard to show in my animatic, so it'd have to be shown through just the animation instead.