It's not that "I hope I don't have to see her again".
But having her as a main baddie for 3 arcs is simply way too much, considering all the other enemies we still have to face. Admirals, BB, Shanks, Gorosei, who knows who else.
I want Oda to be able to actually draw the end of One Piece. I don't want him having a more serious problem and fucking dying due to the excessive workload.
Despite the fact that I love Big Mom, I just don't think we have the time to fit her as the main baddie for yet ANOTHER arc. Ler her go. There are other people to fight. Move on.
The thing that most people can't accept or see is that Oda clearly enjoys drawing Linlin. He literally keeps adding new plot points to her every chance he gets. Sure he loves clowning on her but, how much fun he has with her character should be obvious with how involved she is in the story and whats to unfold. His best arc when it comes to pure creativity (and the best arc of the ts) and unique creations is her arc.
The admirals will be given relevance but, it won't be more than surface level when it comes to story and how well he'll flesh out their backgrounds and characters. They'll be a suped up version of the Beast Pirates who were there to simply be cool fights for the SH's with some minor plot tie ins.
Only Teach and Shanks will have any major exposition. This is a pirate Manga and pirates will take precedence.
Also don't misinterpret my take about admirals. It has nothing to do with Powerlevels. They'll be strong sure, but anyone who has hopes of Oda developing intricate or complex stories for them will be in for a very rude awakening. They're there to be strong opponents to be overcome by the SH's and Luffy's allies, nothing more.