I really liked the way it ended. Sealed the last 4 seasons very nicely.
I suspect that Jack, Tony, Michelle, and Chloe should be gone by this season. So this gives the writers a chance to start again.
The last 4 seasons were just awesome. But I did find this final episode a bit predictable. Especially the plot of Michelle/Tony. Also, it was expected that Tony, Michelle, and Jack were not going to die since they were the main stars of the show. So by having them all gone, it leaves a whole new possiblity of things to happen for the upcoming seasons.
Love the way how everything was closed though. Nice and happy