I was under the impression Syfo-Dias died before that.
The final arc of the Clone Wars, at least until the fan demand can put together a revival (Hey, it worked for Family Guy and Doctor Who), is a mixed bag for me.
I thouroughly enjoyed the majority of it. Loved Yoda's journey. Loved Dagobah. Loved the return of Liam Neeson as Qui-Gon. Loved that it delved into the Force Ghost issue. Loved the trials set by the priestesses ("the Whills?" I kept thinking, though it was never confirmed). Loved Darth Bane who I can't believe I didn't realize was Mark Hamill until the credits. Loved the mind-battle between Yoda and Pal-err-Sidious. Yoda's "Temptation," i.e. seeing all the Jedi alive and friendly, was heartwrenching (oh if only I could actually see Obi, Qui-Gon, and Dooku chatting like friends in the true timeline), before it all went dark that is.
I loved Yoda himself. I've never been impressed with Tom Kane's Yoda voice, but he really does outdo himself here and hits all the right notes. I love how he ropes Anakin into helping him escape. I love how he takes R2 with him. I loved the reappearences of Valorum and Ahsoka (even just a memory of her).
Really, I guess, there's only one thing about this arc that I really didn't like, and it's a "didn't like" that nearly overshadowed the whole thing:
The Jedi know too much now.
They know that Dooku is Darth Tyrannus and the one who had Syfo-Dias killed and ordered the Clone army in his name. This in addition to even the limited info Fives was able to give Anakin and Rex before his death should have completely derailed Palpatine's plans and allowed the Jedi to save themselves.
It's one thing to be so wrapped up in outdated dogma that you can't see the forest for the trees. It's quite another thing to be given the freight train schedule and standing in the middle of the track anyway.
But, at the end of the day, it's still one of the better arcs I've seen, and I still miss this show.