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greatninja3
Doesn't mean he has to use it. Just taking it away from Eren could already be a major win for whatever faction he's working with. Paradis would be completely fucked. They've said before if Marley obtains the Coordinate in any fashion, it's pretty much over for the Eldians. Hell Zeke blowing his brains out the second he obtains it would even do the job. Would the coordinate follow the same pattern as the rest of the titan powers and be inherited by a random person? Or would it fully disappear? Lots of questions for that.
It's also possible for Zeke to use the coordinate against Paradis. Why? The loophole of the King renouncing war against Marley/the outside world. I don't know if it applies to finishing what Marley wants and giving the Eldians on the island the 'justice' that the King claimed he was willing to accept.
As for people saying the attack that Eren did was stupid since it could hurt his chances of an alliance; we saw one faction leave prior to the attack happening. It's possible that they informed trusted allies that the attack would take place and not to show up or leave early.
I've a hunch that the Warhammer power is going to be crucial to Eren pulling off the fuck Zeke strat.
I mean Zeke would need the Jaws titan to eat Eren in a fight now.