I'm really not hung up on the Hana/Megumi thing at all. We know Angel and Hana coexist in one body, which basically implies Angel can't/won't forcefully take over Hana. Amd that lead to Hana making a poor choice even though Angel warned her to stay back.
What I am a little hung up on is the activation of Angel's CT. I knew that for plot purposes there would probably be a gimmick around it (which is the chant ig) but still, Sukuna still remaining in Megumi's body after being blasted with this supposed OP CT is weird
Maybe it will be revealed that she shaved off a finger or two worth of Sukuna, but I doubt it.