Yes, it is under the new CBA. There is not 100% clarity on it but it seems that two players per team can sign under the DPE - designated player exception and Klay and Green will likely qualify for this if they don't already.
https://www.washingtonpost.com/news...-bargaining-agreement/?utm_term=.76e717acd140
https://www.reddit.com/r/nba/comments/5ikqx9/marks_under_new_cba_klay_thompson_and_draymond/
As far as Steph goes I believe he can get 35% of the cap, which is over $35M, and Klay and Draymond could get 30% with this new rule I believe.
If all three take as much money as they would technically be allowed under the new CBA I believe they'd be at about $97M combined. This does not count Durant, and I believe his option is for $27M next year. So combined they would be around $135M if they all take the max they are allowed; more if Durant wants more than $27M. This is with 4 players on the roster...
Unfortunately Love and Irving can probably do the same if they make All-NBA. I guess at least the Cavs would only have 3 of these max players instead of 4, but still a ton of money when you account for TT and JR having pretty big contracts as well.