My thoughts, stated in my own fan edit thread, is that I can't imagine Padmé falling in love with a guy who thinks like that. That's not even to mention the mass murder confession. She is an intelligent person, and very clear-minded one with passionate opinions. Padmé is very much like Leia in that she has strong principals, and stands by them to the very end. Anakin has opinions, but they're not very well informed ones. He is also too arrogant and foolish to really take the time to understand the whole picture, and come to an informed opinion on the matter. Anakin, to me, comes off like some 12 year old kid talking about politics.
Even laughing it off, it's still something that would stick in her mind, and probably make her feel very uncomfortable. How can she be married to a man with these unsettling political viewpoints? She is a peaceful, mature, and diplomatic person while he showcases nothing but violence, anger, rudeness, and tyrannical ideals. They are stark opposites of one another. By all rights, their relationship, as Lucas presented it to us, should fall apart like a bad blind date. I believe removing anything that creates turbulence between these two should be minimized as much as possible. It diminishes their supposed romance. That way, when thigns start going awry between them in ROTS, it's more impactful. It basically comes down to how you want the characters to be portrayed, and where you want them to go by film's end.
-NJM