No. Not if the easy to use auto attack was balanced before. By that argument riven should be alot stronger because her kit is hard to use optimally. A champion should be balanced around the highest level of play on the champion. That means if every champion had a 1 trick that was eaqual skilled then when they faced each other (assuming multiple games and equal marches against every other champion, so in short a perfect set of circumstances) then every champion should see 50% winrate. It doesn't matter if your playing Annie or azir. How hard it is shouldn't define the power level.
And by shifting power I'm assuming your refering to adding a shit ton of damage if you land your skills. Which is not a power shift. Its a buff. It may be less likely to to happen as often. But it's still a buff.