After some reflection, I would bring my rating down a point, specifically because of the parody element. The found footage made sense as part of the plot, but what were the intro and ending bits? Was Final Frontier a real show in universe, or was it something the recreation room invented, but for some reason manifested by the rec room when a human was not inside it ? Nothing in it was necessary for the plot, and it seems to be just a gratuitous parody.
Second, I think the parody was somewhat mean spirited for something that is part of the franchise itself. It wasn't Kirk being parodied, but Shatner himself. There was no effort to distinguish between his questionable acting choices and the elements of his own personality that snuck into the performance. Some of the speech patterns are normal for him, not an act. Moreover, the parody also happened outside of the Final Frontier world. Shatner has peculiarities, and he could be selfish when pushing against other actors getting the spotlight. However, I have no doubt that he has given more to the franchise than he received, as an actor and as a documentary maker. There have been many parodies of Kirk in movies and TV. Those in comedy variety shows will be broad, of course, but there have been many that have been very well thought out. It was only a few months ago that John Cho was teaching a female robot about love in Sanctuary Moon, the show inside of Murderbot: it was a great parody without looking like a personal attack.
The parody of Roddenberry is also mean-spirited, but as the creator who constructed a complicated mythos for himself, he is at least a better target. We have already had a good parody in the form of James Cromwell's Cochrane. I am no myself convinced that Mount was doing a full imitation of Roddenberry.
