In Champ Select add the "chest earned" boarder to the champions
That way when playing norms I know which champs I can still earn a chest on.
EDIT: This has a ton of upvotes.. maybe we could get some sort of Riot comment?
For those saying "How hard is it to check before you get into a match?" well.. when you have most of the champs and a good number of chests earned on them it's hard to recall all of the champs available on the fly when you're trying to make a team comp. It's not always as simple as ChampX has no chest earned.. I'll play that champ. I'd still like to make a pick that works with the team in w/e lane I'm in. Besides - it wouldn't add any more clutter to add the already made boarder to the champ select icons.