It's interesting the things that were cut or changed in the Star Trek universe. I'm lucky enough to have found and purchased one of the original scripts from ST: The Motion Picture at an auction several decades ago. For those that aren't aware, in the original script, Commander Decker and Ilia are both alive in the original ending, which was changed (twice) after several scripts were stolen to the ending we all know and love.
On a side note, I would love to see a future episode with Gary Seven and Isis. Food for thought.