As far as when exactly TMP takes place in relation to the series... In one of the supplemental features on the TMP-DE, Robert Wise said that it was always their intention for the movie to take place just as long after the series as had passed by in real life. He said he didn't know where the idea came from that it was only a couple years later. (I think that comes from the Reeves-Stevenses). But what did Wise know? He was only the director.![]()
That may point to Wise being unfamiliar with the series itself. Or else he would realize what the "five years, out there" would mean and change it accordingly.
Kirk being out of the Captain's chair for close to a decade would tend to hamper his ability to credibly take command. Reminds me of an episode of MASH where one of Potter's old friends had spent a ton of time in Washington and came back to front line command to get his promotion to Colonel.