Some recent thoughts on the series, culminating with this chapter:
i. Regarding Mikasa, Eren fails to see the larger picture. If she were operating just under the Ackerman drive to protect the king, her actions would be limited to when he's in danger. That explains why she stopped Armin from attacking him without even knowing what she was doing.
However, because in this great manga nothing is by chance, now I see there's a meaning to when Mikasa insisted that Eren eat all his bread. That, and maybe other small tokens of affection are completely unrelated to safeguarding his physical integrity from imminent attack. Likewise for Mikasa's jealousy towards Annie; jealousy is of no value for personal protection. (Perhaps reminiscing about the girls' catfight will be the thing that will bring Eren to his senses?)
It's love, plain and simple. Eren was so focused on the Ackerman Drive that he doesn't see it's not mutually exclusive with love. Both can be real at the same time. And this is very sad.
ii. Zeke's plan has several potential pitfalls. I'm guessing Eren didn't tell him nearly as much about the Founding Titan, or the other discoveries the people in the island made about Titans, to Zeke as he told Eren about his own findings.
And that is very dangerous.
For one thing, does Zeke know Eren is the dominant player when he touches a possessor of royal bloodline?
If he doesn't, I can't even forecast how things will play out when he finds out.
If he does, then his plan must be to eat Eren, turn everyone sterile and then die, thus destroying four Titans at the same time (Founder, Attacking, Warhammer, Beast) and preventing them from coming back in an Eldian baby.
And then comes the greatest question of all: did Eren tell him Zeke's own will would be taken over by the King's will?
I'm betting he doesn't. Which means that it will be a disaster - wholesale Eldian genocide - if Zeke eats Eren. Not that Zeke would care that much, given that his plan is for everyone to die of old age anyway.
iii. For another thing, even if he could somehow overpower the King's Will, Zeke's counting that he'll be able to sterilise everyone and live out his life. I suppose that's a fair assumption, given that he can change the memories of all Eldians and essentially control them.
But even if Levi's dead, there's still Mikasa. She's immune to the King's power. She could defeat Zeke, Titanise an Eldian and have them eat him, thus restarting the cycle.
There are too many things that could go wrong. Zeke's plan's quite flimsy, at least right now.