If "Court Martial" were written today, I could easily see them showing the ion storm incident in flashbacks, framing it so you still couldn't tell whether Kirk was telling the truth or not. Seeing (apparently) sane Finney in the ion pod would make it more of a contrast between the man Kirk thinks he knows and the man he actually is/was.
It would have been interesting to dramatise the incident that got Finney demoted, too, and maybe an unrelated scene before that - when they were still friends, maybe with Kirk meeting baby Jame.
It would have been interesting to dramatise the incident that got Finney demoted, too, and maybe an unrelated scene before that - when they were still friends, maybe with Kirk meeting baby Jame.