Didn't he already kind of do that with Kyros and Scarlet? Their flashback is probably the closest Oda's ever come to including an actual romance story in One Piece.
Oh yea, I mean I guess my mind was set in real time, like if he somehow made the whole Tashigi/Zoro tease work, despite there occupations, thats assuming he does throw in the romance for these real time characters
In my opinion that flashback was good, but I wouldn't deem Oda a romance writer as apart of the story solely on it, if he chose to execute more of it in the future then it'd be a possibility to add that in as genre of One Piece, but so far I would say romance is the only genre One Piece doesn't rlly tackle, so we'll see maybe he'll get more straightforward later on with romance in the story, I always felt like they'd just be more summed up in the story like Gold Roger and Rogue, or like Sanji comedic moments