I understand the desire for explanations and the belief that they would help the process, but I think it's an illusion, and that's why Ts don't do so in general. Most psychological process is affective in nature, even CBT under the surface. To engage in explanation would be to switch focus to an overtly cognitive process. Many clients use cognitive distortions as a defense and while some modalities do engage in direct refutation of distortions, psychdynamic process tends to prefer to do an end-run around such distortions. It is out of the confusion and guessing that affective truth is both revealed and healed. It's the language of the relationship. Changing that language changes the relationship.

[As an aside, there's quite a bit of good research showing that controlled--not overwhelming--confusion also aids in learning. That while deductive processes are more efficient in transmitting information, student learning is deeper and farther reaching when the result of inductive processes which also tend to invoke a certain amount of confusion.]

Any relationship after termination reflects the relationship before termination. I think many would feel confused and shaken if the T suddenly abandoned the prior patterns. And it could create harm if it led the client to then view the prior relationship as falsely created.

I think the circumstances surrounding termination play a role, too. If there was a transference that governed the relationship, especially if it were not resolved, that influence will continue. And a T has to be very careful to not upset that because there is no longer the control of the therapeutic relationship to repair any damage created. If there was a sense of completion of the work by termination, versus termination before the work was completed, any transference and its dynamics will still carry over.

For me, the work was finished and the transference resolved. But the attachment underlying the transference remains, and that attachment was and is a father/daughter one. So that pattern of relating continues to characterize the relationship, even in the face of changing boundaries.