If Klay was what he was, then even without Dyramond they could have won the title. In any case, I just think they are way too old now, and the chance for them to win a title is gone, they got one last ring and they should be happy with that, it's over and they should go home.
About Draymond Green, it will be difficult for them without him because of the high success rate of pick and roll with him and Steph Curry and then he is a big factor in their defensive positioning.
He can indeed be replaced but if we consider the time it will take for a new player to learn all that play, months or years of practice will be needed and Steph doesn't have that because of his age. All the Warriors can do now is put some players that would enhance their winning rate. Well, Brandin Podziemski is one of those players. Then, Kuminga is also stepping up his game and so is Moody. These players will be the key factors to win games, especially without Draymond around. But I will still not say they don't need him, he can be replaced but it's like starting all over again.
What they really need is for Wiggins to step up his game. He is back to that Timberwolves inconsistent player who I hate the most. I loved him last year because of his great contribution and phenomenal energy but this season had been a bad one for him. Too many errors and his post-up is not that good anymore. He played well against the Portland Trail Blazers but like I said it is inconsistent.