U.R.F is too one sided

From my experience, i have seen many champions that dominate. One such champion is Jayce. He got a penta kill while we were inside our own fountain. Another champ like this is Maokai. Even though he now has a sapling limit, he sill does an insane amount of damage and there is no way to counter it. I think that Riot should fix this unfair balance in power.