It all starts with the branding, came up with the logo for Rocket League professional player Kaydop.
Also, a streaming/overlay package, pretty standard and has all you would expect as well as a few unique features (which I'll be posting about more soon).
Lastly, we have sub & bits badges to wrap up all his chats needs.
If you're a fan of Rocket League as well (and you happen to speak French, that helps usually) you can check him out right here.
PS: As of this writing, a couple of his overlays have changed so some of these are no longer applicable except for a few.