I still would love to see Shard rentals get updated
Currently renting a champ w shards removes that shard from your inventory. You lose BE its worth and the 40% discount in BE it provides. I think it would be really cool if on activating rental the shard remained in your inventory, you could upgrade it to permanent if you like the champ, and at the end of rental when it expired it provided BE.
Admittedly this change would do literally nothing for me and folks with all champions but I think it might be a nice feature for players looking to expand their pool and who wanna test out new champions and don't wanna spend X amount of time waiting for free week to show them love.