The thing with Anakin and Obi-Wan swinging their lightsabers, not doing anything was explained on Tumblr. Apparently it's a fencing thing where you're daring the other to strike first. And because this is a post on this forums about Tumblr, "OMG THE FEELS"
I think that the pregnancy, the stress from finding out that Anakin did what he did, getting Force Choked and the environment of Mustafar was what led to Padme dying. Of course, I'm not an advanced medical droid so what do I know?
Anyways, great episode guys. I need to watch this again; I'm pretty sure I've only seen it once, and that was...8 years ago. Man.