Michael’s erratic behaviour (which also bothers me) could be explained. Exactly how far Sarek is influencing Michael is unclear; we see the start of their conversation, then Michael returns to the bridge and starts trying to dictate their course of action based on what they say Sarek told them about the Vulcan’s interactions with the Klingons. There’s a similar pattern of behaviour with the later interaction with their apparent psychic connection.
I figure later plot twists will require ‘established’ truths to be revealed to be false, so tried considering what we ‘learn’ in the pilot and how it affects people’s actions.
What if T’Kuvma is full of shit; what if he’s a puppet engineered by someone else to provoke the klingons into war with the federation. Good odds that plenty of people would stand to profit, and all you need is a convincing Klingon actor or religious nutjob and to knacker an unmanned relay station. Plus any additional macguffins to make it more plausible at a later date.
Spock is alive at this point, so Sarek has already married Amanda. I have no idea how many kids he ends up with, i suppose given his age it could be dozens; he has at least one full vulcan, one half vulcan, and one adopted human child. He appears to be quite strict with Michael but clearly has a thing for humanity. When Spock died Sarek knew he would attempt to mind-meld and transfer his consciousness/memories into another crew member as he checks Kirk before finding them in bones, but eventually dies after suffering a neurological breakdown in TNG; was he planning to do that himself? Ignoring the fact genesis regenerates Spock’s body somewhat unexpectedly, what was he planning to do with his consciousness once it was transferred?
Sarek wants to be immortal. Sybok (from Star Trek V) is a first attempt at engineering a suitable host (possibly a clone of Sarek) that went awry/insane, and has it’s own weird psychic power. Spock and Michael are his further studies/experiments, and his experimentation is what ultimately leads to the neurological disorder that kills him, and why Spock doesn’t attempt to do the same again when he next dies even though he has the chance to dump his consciousness into his own younger body prior to his death.
Of course all of this will only be revealed over the next 40-50 years real-time, making it a single century long plot. Disco will focus on the rest of the war and whatever shenanigans Michael gets up to.