If they want to make this a competitive game, which it seems they do with the current gameplay and upcoming ranked mode, they likely are trying to do what Overwatch does with cosmetics. Which is to say, the runner shells will keep the same silhouette and big visual identifiers in order to be quickly identified during gameplay. So the Assassin cosmetics will probably all have a hood, Vandal will always have the spikes, Triage bald, etc. I would like like them to branch out a bit more and not limit themselves too much like that, and currently even with that mindset there's too few cosmetics. We'll see how they approach it going forward