Just watched the LiveStream about the coming seasons. The part about the clan banners got me thinking. It would be super cool if when you are playing with a full fireteam of your clanmates in crucible (or the opening of the raid) the lead/middle character holds the banner before the match, like how the opening to control matches was in D1. Just a suggestion to make them more prominent in game.
Or even have the banner as a transmat effect.