How is the new season?
Haven't tried it.

But Season 17 my Witch Doctor finished here.

I got burned out a while back. They need some new expansions, new missions and new classes.

I think Blizzard's philosophy is that by making changes to the classes each season, that's supposed to keep the game fresh and interesting; however, like you, I'm of the opinion that they need to come out with new expansions and storylines.

I built a pretty badass Demon Hunter and an even more fun Monk in Season 16. But I'm not one for grinding through just for the sake of climbing a rank ladder. I quit before that season was finished.