They know what they need to do, but it's a matter of them having the ability to do it.
Barry tries to drive and kick, but he's just not as quick as he used to be, Finley has made attempts to come off screens and shoot the mid-range shot but they're often contested, and Bowen does take the corner three when it's given to him.
IMO, the problem is more on the "declining ability" side than it is on the "not making the right play" side.
Basketball is SO much easier to figure out....it's often best to just give up...