A great feature that would help sell cosmetics would be...
….a quick replay at the end.
So instead of showing everyone running in a field, you coudl just replay some highlights like Mario Kart 8 does. A few attacks and dodges and chases.
See, when you buy comestics, you don't really see much of them when you're playing. It's the other players who see them. A little replay at the end of each match would make them feel a bit more worth it.
Comments
They've said many times any match replay system cannot be added at this point, would have needed to been coded in the original game in 2016. Apparently it's near-impossible now, the reason sadly the players themselves have to record their matches when reporting.