Why not? People having relative control of their account is a menacing thought?
Allow me to clarify the impressions of RDTs, obviously it would be limited to 1x a month in-game store. I think it's a fun dynamic with fair balance.
So you would rather spend units/money to rank down a champ and rank another one up than just get the resources directly and have another champ ranked up? Sounds counter productive.
If RDTs were sold in store...this would be a valuable addition to the game. Seems viable to me, maybe something like 500 units for 5*, 1000 units for 6*, or that nature. What do you think?