I thought Umbara was great. Yeah yeah, we had no villain, but the whole point of it was to show it like a war movie, not our usual TCW episodes. I think that showing things from the clones point of view and ONLY the clones point of view was interesting, the only other episode that's ever done that was Clone Cadets, and that was during the clone's training excercises, not during real combat. Yes, I know there was Rookiees and ARC Troopers, but that still involved the Jedi and the villains' POV, not solely the clones.
The only episode in Umbara that was slowed down by this POV was Plan of Dissent.If they had cut out some of the fisrt ten minutes and combined the episode with Carnage of Krell, perhaps somewhere after all the clones killed each other and Krell is suspected to be a traitor, it would have been alright.
Not to mention, for those of you complaining about a lack of villain, Krell WAS that villain. The whole point of it was that we didn't know entirely who the enemy was until it was nearly too late. It was supposed to be a surprise! If they had shown some CIS scenes involving Krell, then Carnage of Krell would have no major twist because we would have already known that Krell was a traitor!