Truthfully the SLV is an anomaly of an edit. It was only assembled so to get more airtime on ABC without any regards to pacing, continuity, or the consent of the filmmakers.
The pacing was bad and with commercials was abysmal. I still think it was the ABC Sunday Night Movie that really tanked TMP's reputation in the '80s.
Well, Lucas considered the OT to be unfinished and even embarrassing in some ways. It doesn't surprise me that he did.
But finished enough for him to release it and take the money.