I have no issues with the Anakin/Padme scenes. The dialogue is fine as far as I'm concerned. There are other spots like when Anakin is being address by Padme for the first time while accompanied with Obi-Wan in AOTC. That's more cheezy to me than the couple scenes.

Lastly, I disagree about Hayden's acting ability. He was hired primarily for his role in "Life As A House" which I thought he did quite well in.

Before you burn him at the stake at leat check that film out if you haven't and then come back and say he's a terrible actor. And for that matter, we all know Natalie Portman is a better actress than what people say she was in Star Wars. The Professional comes to mind.