Having finally finished watching this series on Netflix I was left with the impression that original ideas are not a strong point with the studio writers committee when developing Discovery's Season-3 scripts.
After a promising first episode, which seemed at the time to be a fresh start, the old hackneyed familiar themes kept pushing their way back in as if there was a list of studio requirements to get out the way, nothing that developed thereafter created much of a surprise, except the sometimes surprisingly poor acting which was only held together by the still impressive CGI and expansive sets.
In my opinion the acting became the weak point of season-3, the show really needed some star status back, returning the charisma, which was present when Jason Isaacs and Anson Mount was at the helm, even Ethan Peck as Spock managed to create some convincing emotion with Sonequa Martin-Green who seemed to struggle with her extended acting role this season, especially when playing her other self in the alternative universe, an episode which takes me back to 'Fringe', which had a multiverse story arc done a lot better, even though Fringe was past its use by date by then.
New star David Ajala became a guest star after a promising introduction in episode one, it's as if someone said, 'Hey, he's not too bad let's add him into the regular cast.' then changed their mind half way through when they realized he was a better actor than most of the main cast.
The same could be said for the best of Discovery's other cast members as well, in season 3 Discovery's main crew members were sidelined into peripheral subplots, then edited into the story every now and then to show that they are actually still part of something, but mostly these actors were unavoidably typecast playing caricatured contemporary role models, like Anthony Rapp, I'm sure his acting abilities would be a lot more interesting if he was given a more diverse character profile to explore, and Doug Jones who we see for the first time without the extensive prosthetic make up as Saru, he is ideal for any future Star Trek franchise, a classic sci-fi character actor but after this show other roles for him may be limited.
I'm not sure where season 4 will take fans, but if it pleases American audiences that's all that matters for the studios, if season 3 is any example I would not expect too much of a change of creative direction.
I give Discovery season three 6 out of 10. Mostly for some of the CGI used.