I think she isn't in the kelvin or more like, if they don't want to retcon her in this trek too it isn't illogical or inconsistent because it's very possible her parents never died here and she thus wasn't adopted by Sarek.
Spock certaintly doesn't seem to have the issues disco-Spock is having in the show (no red angel visions etc etc), he seemed to be an only child.
To be completely honest here, as much as I wasn't against Michael being his sister I prefer his old assumed backstory (thus the one used in the reboot) that he was the only child in Sarek's house. That makes more sense to me as it explains many things. Discovery is opening up many inconsistencies.
Definitely though, the idea he was completely oblivious about humans before meeting kirk&Co is really really silly to me.
People forget about Pike and also that Spock probably had a human family from his mom's side too. What about his human grandparents and cousins? Sarek is a messy idiot but the idea he asked his wife to give up about her humanity and her family for him is too much. There is no reason why Amanda's parents and family wouldn't be allowed to interact with her son ever.
I sort of disagree. Michael owns discovery and is the centre of everything even for a main character.
In short, she's the protagonist.
I think she would have been a strong female lead in the reboot. uhura was strong yes but never fully able to expose her reputation as Spock's pet (girlfriend). Carol was kind of usless in darkness, Jaylah was good but a little to late to the party in beyond.
Unless she were the protagonist in these movies too, it is unlikely Michael would have a bigger role than the female characters of this trek especially since she doesn't work on the same ship.
Uhura isn't the protagonist so of course her character doesn't get developed as one, but she's a strong female lead in her own merit and a tremendous upgrade compared to how tos treated Uhura and female characters in general.
Honestly, she's a stronger character than most of the secondary (she is one too) guys.
The problem is that the audience has the habit to hold female characters to double standards and thus the way their contribution to the plot is minimized or underrated is directly proportional to how overrated or overinflated guys are, both secondary and protagonists.
In beyond, Uhura is sidelined like many pointed up (better editing and Lin not cutting/reducing some scenes would've helped that tbh) but she still has a big role with the villain and face time with him that if she were a male character she would get more credit for that and there would be no question the character is a lead (and thus her prominence in posters is consistent with the movie). Even her role as Spock's girlfriend is always important even when she isn't even there. For a secondary character her role is pretty good. The only way you could improve that is by making the movies more an ensemble than the Kirk show, which would be a great idea honestly.
The protagonist is allowed to access to narrative elements that secondary characters aren't allowed to access to. Even in tos, the star was Kirk. Spock and McCoy both got more screentime than the others BECAUSE of their connection to Kirk. In these movies it's the same for Mccoy where he's mainly Kirk's friend, while Spock was elevated as co-protagonist (in the first two at least) so he has a life outside of his dynamic with Kirk (hence his relationship with Uhura)
I think it would have led to an awkward issue where Spock was dating someone that reminded him of his sister
So, do you believe Spock being with Uhura also leads to the awkward issue that he secretely wanted to fuck his mother?
Just because his sis and girlfriend are both black it doesn't mean they are
the same or Spock perceives them as the same.
That's problematic and lame, and I'd sure hope the writers wouldn't avoid putting Michael in this trek JUST because fans gotta be like that.
Of course, maybe you totally meant she reminds him of Michael because for you they are the same character personality-vise, but as they obviously aren't we are left with the idea your comparison is entirely, or mostly, based on their physical appearance (and even that is a stretch because Zoe and Sonequa aren't exactly clones of each other..)
Would you have that thought if his girlfriend and sister were both white but like Uhura and Michael, they were different people? Think about it.
If after 3 movies you cannot understand or imagine why the guy (or anyone) would be attracted and fall for someone like Uhura, and watching discovery you don't see that both Uhura and Michael are their own characters with no more similarities than between Uhura and any female lead, then this is a whole different "issue".
Because, by now, you should have enough canon evidence to at least suggest you that what you said at the beginning isn't the case.
To answer your comment, the only ones who would find it an 'awkward issue' are those who are limited and biased against some characters or narrative elements by default, and who STILL can't accept Spock's feelings for Uhura hence, they need to rationalize them with lame crap because it's easier than simply watch the characters and their stories and thus understand them.
I say you shouldn't care about these people and neither should the writers.