Actually just finished watching the whole Clone Wars series. Never saw it until a month or so ago when it went on Netflix. Actually really liked it, and would recommend to any fellow Star Wars fan!
There are some story arcs I didn't care for, but as a whole it's really, really good.
I'm hugely disappointed that we weren't allowed to see what happened with Asohka, Rex and Asaaj. I have a feeling they may be holding onto them for later, but they have been set up to be cornerstones of the rebellion. I would have loved to have seen Rebels center around those three characters.
Unfortunately, it looks like Rebels may be for a younger audience and a little goofier than The Clone Wars. I'm VERY concerned. They never should've ended The Clone Wars series like they did.