ARAM Rerolling Possibilities

I think that Riot could help players to reroll again if they run out of rerolls for a small RP or IP cost. Of course the RP being like 25 or 50, and the IP being like 250 or so. Then maybe after the first RP or IP roll, the next roll would cost a bit more of each RP or IP like 50 or 75 RP and 400 or 450 IP. Maybe a bad idea, not sure. Thoughts?