SPOILERS......
I thought the finale was pretty good, and I'm going to miss the show. Much like Clone Wars, I thought it got better as it went along. If you watch the Rebels Recon for this week, Filoni actually confirms that Ezra and Thrawn both survived the end.
I'm really curious to see what's next. It has been a lot of fun watching this with our daughter the past four seasons, and I hope a new animated show isn't far off. I know there were rumors of a sequel trilogy time framed series. I'd really like to see a post-ROTJ series, if they were allowed to cover that time. Carry through some of these characters from CW, Rebels, and maybe some of the OT cast shows up as well.