S ranking and Unlocking chests with them.

I love the new chest and loot system, and I love the fact that playing well and keeping deaths low while picking up farm kills and assists can unlock this loot for you as well as give you a confidence boost for getting multiple s's in a row. Unfortunately there isn't much reason to get or try to get an s while you have no loot boxes to obtain. I think it would be awesome if getting an S shaved off part of the time before getting another loot box for S's afterwords. Maybe 20 minutes or an hour, however balanced just seems like good way to motivate people to always strive for those S games.