No Riot, Make elemental drakes bonuses completely flat!
Seriously, I don't know how many times I have to explain this % bonuses on the elemental drakes always favor the winning team, because they are lower risk but equally rewarding.
Where as a flat bonus is proportionally more rewarding for the losing team, +10AD (let's say) on the losing team with only 100AD on your ADC (+10%), means a lot more than +10AD to the winning team with 150AD on the ADC (+6.66%).