Champ select should display who you have chests available on.

I have earned chests on many of my champs and have a bad memory. I want to try new champs and work towards additional chests but by the time I get into champ select I don't know who to pick or my selection is banned. It would be great to see who you have chests available on during champ select. It will encourage trying additional champions in addition to helping me and others earn their chests.