This team looks a lot like the over-the-hill teams we saw for years in Chicago, New York (both), Philly etc... before they realized that expensive vets in their mid 30s can't be the foundation of a perennially successful team, especially when you have a mid-tier payroll.
That isn't to say that they can't hold off father time for one more season, but the struggling core players are old, and skill decline happens to everyone.
I think that the regime change happened just in time. Doubling down on what happened last trade deadline would not have been wise. The supporting cast has been good enough to give the stars a chance to win, and to this point, the stars have looked their age.