Posting this purely because I'm tired of explaining to my friends which shells do what- Outside of that, I think it'd be a nice quality-of-life feature.
As for the 'Item idea proposal' part of this post, I'd like to see a 'Mystery Shell' added to the multiplayer mode of the game, either being inserted into the rack as an item OR have it be lined up with all the other shells at the start of rounds. Either way, it'd significantly raise the stakes and make any lobby a hell of a lot more chaotic (and bullshit-)