I'm with you, I'm actually fine with Peach. She was powerful but definitely shown to have her limits, and most importantly she showed good character in supporting Mario and never trying to take the spotlight from him.

Mario had fantastic moments in this movie. They gave him the lowest lows and the highest highs and the final victory was all him and Luigi, as it should be. It was such a definitive statement that I was impressed that a big studio film could still do that. Overall I was pretty happy with the movie (especially Bowser and his ode to "Peaches") and its flaws, while real, can all be kind of written off because it doesn't take itself seriously.