That won't work. Isayama made a point of Armin "noticing" how when Eren touched Dina it was Eren's will, not Dina's, that the titans obeyed. So Zeke can not do more than what he did in Shiganshina with his yelling, and Eren can easily undercut him by using Historia, for example. In short, the rumbling ain't happening unless Eren wants it. As for the Eldian military, especially the top echelon and Zackley specifically, they are not a particularly valuable bunch. Zeke probably wants Eren to do in Paradis what Willy had him do in Marley, clean up the house, and it makes much more sense for Eren to want the same this time. I am still at a loss how they plan to transfer titans from Paradis to wherever they are supposed to serve as a deterrent against others, but it was made clear several times that it is somehow doable. Perhaps ravaging the coming Marley invasion will be enough to send the message. I wonder if this is something like emperor Lelouch play for Eren, he absorbs everything that everybody hates Eldians for, and then lets himself be destroyed so they can live. On a second thought I agree, Falco might be done for. He was kind of prepped to be the red shirt that finally helps Gabi see the light and have an epiphany. First used by Eren and now by her. Fitting.