Add a warning the first time you play a reworked champion
Title says it all. I play League a lot less often than I used to. Occasionally I'll pick a champion that got reworked and not know it. I mean you can still win obviously but in the instance in question that prompted me to post this I got thrown full on tilt. I obviously hate the champ's rework but that's not the point. Had I known he was reworked, I would have picked something else so that I could try out the new kit later in a bot game or lookup the champ's new kit before starting a normal match with them.
I don't feel like this has any downsides. It can't do anything but help. I suppose if (and likely the case) this never gets added though it is what it is. Won't take a lot of losses (or tilted wins) to figure out who all has been reworked.