^ This. The barricade on Coruscant (which could be accomplished by a shot of the planet with the Trade Federation donut ships from EpI surrounding it), makes Anakin's trip to Mustafar a reckless but valiant effort to save everyone.

To your parallel, Luke didn't go to the Death Star to destroy it. He went to try to convert Anakin back to good. If he succeeded, they could take down the Emperor together and restore peace to the galaxy, but he knew he was risking his life to do so. This is very similar to what Anakin would be doing in your suggestion: taking down the leadership of the opposing forces. What makes yours better is that Anakin knows it's pretty much a suicide mission no matter the outcome.

"See, the point is that they rhyme, so it's like poetry." - GL

And yes, remove the dialog from the Ady/Obi duel. For too many reasons to list here.