Who are their old roleplayers outside HWSNBN? The Dubs were reliant on some older players, but as I said the chemistry built between them was what made them scary. On top of that, as some people said, with the addition of Durant Curry has been relegated to second option on top of Klay/Green being dropped down another notch. Despite how they may say otherwise it does have an effect on their games/mentality; they were already a mentally fragile nucleus before, and adding another softie in Durant can't help matters (obviously the talent jump is huge, but whose going to step up when the going gets tough?). There's also the possibility that they could've sought out roleplayers to better enhance Curry/Thompson/Green rather than gone all-in on adding Durant.
Obviously, any team would've jumped at the chance to add Durant and when the Dubs did I was sure they'd own the league for the next five years. Now, however, having a large enough sample size, Durant and Curry talking about getting paid, and with the new CBA and everything it entails I'm not so sure.