Also, after KD left, it was a complete rebuild by the GSW, maintaining only their big 3, Curry, Thompson and Green. The rest of the championship team are now gone, maybe except for Andre Iguodala, who is a returning player. Curry was back last year, showing flashes and still at his prime, become the scoring champion, but was eliminated and didn't make it to the playoffs.
But with Klay Thompson back in the team, I think they can make it in this year playoff, but going to the finals will be very difficult as there are a lot of good teams in the West.
Don't forget about Andrew Wiggins. I think he will be better this time if ever the splash brothers will show him how it's done. Those two are scary when they are hot and can be contagious. They could pull Wiggins into being more motivated to win the game rather than just playing around.
Yes, I'm not forgetting about Wiggins, he already proven himself last year, maybe just another increase in his performance and definitely he will be a big factor, big 3 + Wiggins.