he low-mid diffed Maho he just wants to experiment and learn more of the 10 shadows he just played with Yoro thats also psychologic if he would end Megumis sister too fast he wouldnt have break Megumi completely
That being said, I changed my mind about Mahoraga's potential and utility after I watched a YT theory. As Maho can adapt itself during a fight even if he's not totally summoned (just its wheel), it could be the most powerful CT against Gojo's domain expansion.
Sukuna could have understand who was Gojo (Muugen CT + 6th eye user), explaining why he wanted Megumi's 10S (Mahoraga actually), knowing that limitless void's only weakness is Maho's unique ability.
Sukuna could defeat Mahoraga because he has differents CTs. Gojo just has (a godly powerful) one.