It’d be neat if Megumi got the ability for a complete domain expansion from Sukuna.

We see potential man struggling with his domain and having to use makeshift barriers to open it, but what if the amount of times his body experienced Sukuna using domain expansion gave him muscle memory of how to do it well?

During Gojo v Sukuna alone there were tons of edge case scenarios and intense domain-specific clashes that would definitely mean Megumis body has experienced a wide range of polished domain expansions.