zombie84 said:

Also, the acting coach in ROTS seems to have been mainly for Portman and Christensen. The focus was on developing the background of their new stage of relationship (married, baby, etc.) and also acting as a "rehearsal arbirtrar" to get more time to hone the performance. I think it shows tremendously. Their chemistry works better. They still have shitty dialogue, but their acting is better. Look at Clones, they are both awful in that film, and even though ROTS is not worth writing home about for performances (McGreggor and McDiarmid being the exceptions, as they were in the previous film), Portman and Christensen as a couple seem a lot more natural and a lot more convincing than the near-parody that is seen in the previous entry.

There were some good moments in ROTS (notably the Padme and Anakin intercutting scene when Anakin is grappling with whether or not to interfere in the showdown between the Jedi posse and Palpatine). The reason I find it so disappointing is because, of all the prequels, it was the one that had to be great and it wasn't. All in all I thought ROTS was edited together really poorly and came across as being less than the sum of it's parts.