Remove Champs from your Rerolls at certain intervals
Similar to how Draft/Rank in SR allows us to ban champs before for the game, but this would just be banning champs from showing up again in our reroll pool.
The idea is that you'd get this every so often (maybe around the same time we draft a champ from the circle?), which I feel would help immensely with rerolling late game to get 3 stars (or sometimes even 2 stars...) and RNG just keeps throwing at you entire sets of 5 champs that you don't have at all...
Like for example, if I'm already at 6 champs on the board and Wild/Shapeshifter isn't in my comp at all, i REALLY don't want to see 3 nidalees show up when I reroll...