Oda plays the long game, she's in Wano for a reason
and the build up to her fight against Luffy existed for a reason
about her Power lvl, BM DF potential is limitless, that's not something Oda would need to worry about a lot, especially if Oda is planning a similar fight to Moria where she can control a crazy weapon or creature...ect
her DF is one the main reason people shouldn't think she's falling here, crazy things Oda could do with the DF in a crazy climatic fight, and there's the added aspect of her homies having personalities related to her mood and what object the homie is in
you think Oda will drop all of that away ? no chance
outside of her power lvl, her story as a whole is important to OP major themes, like family and blood ties, racism and discrimination, and Motherhood, she's basically THE MOM of One Piece, Oda obviously is planning something big here, since obviously he's planning to explore these themes further through BM, especially Motherhood Wich is a big subject in the story
another thing people don't realize, her crew is actually a perfect fit as opponents to SHs Wich can't be coincidence
Streussen and Sanji, you don't think Sanji won't fight a character that have "the cook cook" fruit do you?
Ussop and Mont Dor, this fight must happen, crazy potential for Mont for to make Ussop scared with his illusion or with scary books lol also Ussop against soul pocus must happen
Amande cut slow, Brook cut fast, everyone assumed this will happen in WCI
Smoothie ability to grow big will be amplified in Elbaf, because she can suck the blood of Giants and become the biggest giant there, her power can only be fitting in Elbaf, Zoro probably will handle her and cracker who his power is about having multiple hands, perfect match for Ashura Zoro ( Cracker must get a power up tho)
Big Mom final arc is Elbaf , you should just trust the build up lol