Filoni gets huge props for giving us stories that support ROTS so much better than it could ever stand on its own. It definitely helps shift the perspective from “one day things were fine and a few days later everyone was dead” to “the entire galaxy was ready for a governing and power shift, and it’s the events of ROTS that really just push it over the edge.”
With Clone Wars finally complete, it feels like we have a solid setup for the movie.