Listened to Simmons and Russillo discuss all of the new CBA cap changes. Based on their discussion, it sounds like it will significantly change things. They rattled off several recent trades and signings as examples that would no longer be possible starting next year. They said (paraphrasing) it will no longer be possible to build a roster with 3 stars. Surprised I haven't heard more about this.
Of note, the Durant/Curry/Thompson/Green Warriors and the Lebron/Wade/Bosh Heat wouldn't have been directly affected by this cap change. Trading for a third big star would be nearly impossible, but both building internally and signing big players with cap space is kind of unaffected.
What it will kill is high priced dynasties like the current Warriors or the Bucks.
On the bolded, one of the examples discussed was the Thunder having accumulated so many high picks and the fact that this system would prevent them from keeping all of them if they draft enough legit top players. Their discussion suggested that the new rules would discourage to some extent the paths that some teams have taken to obtain a lot of high picks, whether by tanking or via trades.
That would be true anyway, the Thunder were never going to have a $200M cap sheet if everybody hits. If the worry is that they have too much expensive top end talent, there are always teams willing to trade four quarters for a dollar.
I think the inverse of their argument might be more of a factor - teams are going to be a little more reluctant to trade their picks for high priced players because building more internally will be a more fiscally appropriate thing to do. Again, that is probably true already as well - three of the four teams in the conference finals built a team internally and made some secondary moves to fill in gaps, but I think it's probably even more true with the new cap rules.