I personally like it the Clone Wars finale for what it was. The last arc of the show was awesome! But as a series finale, I felt like it left me with too many unanswered questions. I want to know what happened to Rex and Ahsoka. I read the Ahsoka novel but that starts 1 year after Order 66. What was she doing that whole time? Where did Rex go? How did he meet up with Gregor and Wolfe? What was he doing for about 15 years until we saw him in Rebels?
I also didn’t like how the storyline in Clone Wars changed the canon. The discrepancies between Clone Wars and the Ahsoka book are not necessary and frankly confusing. So what do I take as canon? Did Ahsoka bury her lightsabers with Rex’s armor in a false grave? or did she simply drop her lightsaber on the ground where it was found after some time by Darth Vader?