ok ok hear me out 👻 all the reasons for omega!Minho could work if he's a beta but not the other way around
- power bottom - absolutely works, especially with accent on the "power", something betas aren't really supposed to have OR want over others, especially alphas.
- the other omegas are his babies - who feel super safe with him because, as you've said, he's not (as?) affected by their heats and can be there for them at all times!! he's their rock!!!
- pack luna - ok this one won't be a direct parallel, but having a designated pack beta, who's calm and reasonable when others aren't and can be their connecting link, is also super cool.
- Minho nesting with Changbin's clothes and pretending he isn't interested in Changbin at all - THIS was where you had me with omega!Minho tbh because ADORABLE but also consider: what if secondary gender is more of a spectrum and beta!Minho just happens to be a bit more sensitive to alpha pheromones than he "should" be. omega-leaning beta who is more likely to get induced heats than ruts and gets some typical omega impulses in those, including nesting. as a bonus, this could make for an interesting reinterpretation of the hyunho dynamic, with Hyunjin being worried that Minho cares about him but isn't actually INTO him, and Minho just taking a bit longer to fully feel non-alpha pheromones.