So I did figure out something (and who knows, maybe this was very apparent to others but I did check with Tracy Libros in Enrollment), that the Summit 8,9,10th graders (now) will get a pretty good bump into whatever comprehensive high school they want.
The reason is that Maier's amendment says for any over enrolled school that they apply for (after they receive their letters of assignment and if they reject the assignment), the first 2 tiebreakers (sibling, then reference/region) apply and THEN the priority placement they get from being displaced.
Well, there is no reference/region for high school; the whole city is the region. So for those Summit students, after the siblings get in, they are next in line. And since there is no school that will fill its entire freshman class on siblings that means they pretty much get whatever they want. That means Roosevelt, Ballard or Garfield.
For people who wanted an alternative experience, it's not much but it does allow them a lot of choice.