I really enjoyed the finale as well. Cad Bane did come off as pretty cool, and I liked the use of Aurra Sing as well (the commentary on SW.com mentions that we'll see more of her). Its going to be a long wait for Season 2, but it will be a good chance to re-watch a number of these episodes.
For the season overall, I agree with Scott, I'd give it a solid B+ as well. It wasn't perfect, but there were a lot of good episodes and the show overall was just "fun" to watch. I think there are some aspects that they touched on better than the prequel movies, particularly seeing Obi-Wan and Anakin as "good friends" as we were originally told in ANH. I never got much of that feeling in the prequels, aside from a scene or two in ROTS prior to Anakin's turn. They have also done a nice job of highlighting some lesser known characters and vehicles and made them look pretty cool as well. I was a little surprised we didn't see more "background" Jedi highlighted during the season, aside from Plo Koon (who we really didn't see past the Malevolence trilogy), Kit Fisto, Mace Windu, and to a lesser extent Luminara and Aayla Secura. I mean, we've likely got several seasons to go, but I don't think we've hardly seen Jedi like Ki Adi Mundi, Shaak Ti, SaeSee Tiin, and others. But, there's time for that.
I found Ahsoka more bothersome earlier on, but as the season has gone on I don't think its been quite as bad. They seem to have tried to tone her down a little bit more as the season went along, and also actually had her "mess up" a little bit here and there as well. For awhile, she was a little too unstoppable as a padawan - Anakin is the chosen one, not Ahsoka
. Otherwise, she hasn't bothered me much - and like I said, has been better in the back half of the season. Looking towards season 2, I hope we see more Obi-Wan (not just in holograms), more Jedi, more of the bounty hunters, and some more clone-focused episodes as well. It was a good season, sad to see it end.