I'm frankly disappointed that Rosberg won the championship in the first place. The guy's a fine driver, but he's a terrible race car driver - in that he's pretty bad in traffic.
He does really well in qualifying, because you're out there alone, trying to make quick lap times. Then he gets on pole, or P2, and runs out ahead of the pack in turn one, and disappears.
When he gets stuck back in the pack and has to contend with wheel-to-wheel racing, I think he gets rattled really quickly and can't perform.
Hamilton, both Ferrari, and both Red Bull drivers are all very good wheel-to-wheel racers. I'd rather have seen any of those five guys on the top before Nico "Joffrey Baratheon" Rosberg.
Glad he's leaving.