It's important that Oda doesn't address zoro and tashigi.
Let him forget them and make them get together in an epilogue.
If Oda address it during the story, he's going to ruin it.
Just look at Punk Hazard.
Zoro not inclined to fight Monet intially because she was a woman.
Tashigi getting "man-handled" 934827123947691328749812394732 times in a single arc.
Being relegated to "she's a woman, therefore she's a mom-type and good with kids" stereotype.
It's better if she stays hidden before Oda shits on her even more.