Welcome back :) it's indeed corrupting her. Since that fateful summer, Keith has been holding her back when it comes to using her powers. The only time we see them used is for busy work which is part of her frustration. The other part is simply being a teenager. She got a taste of revelry by killing those Thai child slavers and that's where it began. The feeling of a tiny life at your mercy. What is happening now is the glory of being worshipped and doted on. What one has to remember is Hope is still learning emotional context so this new feeling is very intoxicating. Even eating Theo's father was sussed out by the fact she didn't like how he treated his son. Still... now that's she's got a taste of what being a goddess feels like. Only time will tell how far she might fall.