You know, there is not another astromech as capable as R2 by a longshot - not even Corran's Whistler.
Why even bother having a squad? R2 can almost handle the mission by himself.
He helped Obi-Wan and Anakin on the Invisible Hand in E3.
He just could not have defeated Dooku. After the escapade when Grievous captured him, I think R2 could beat Grievous in a rematch. Just in the movie, Obi-Wan got to Grievous first.
But I'm glad to see an episode focusing on Artoo. We haven't had one for a while, but he's always there, contributing to every mission.
Personally, the Separatists lose and the Republic is lucky that Artoo never joined the Droid Army.
Remember when Artoo reprogrammed the Battle Droids so they could take the Citadel and rescue Tarkin? That's what I'm talking about.