I see DC pushing it like Marvel pushed Storm and Black Panther.
Connection is there, but it's not a steady flow between them.
Yes, Dinah is suggested that she's going to move to Star City, but I highly doubt it's just for Ollie. Mia has almost always been like a daughter/young sister to her, and then there's Roy, and we know for a FACT that her favorite 'niece' Lian is there. Dinah also has a tentitive relationship with Connor.
They are her family, it stands to reason she'd place Sin in the closest proximity to a family group that she could.
I'm praying that DC will be smart enough to allow Dinah to say 'no', sure it's passe and she did it once before, but third times the charm, and while Ollie is sorry *as shown in BoP* perhaps it will give her the time to 'finish' healing, and him the time to prove he's not such a jerk, which if DC is going to pursue this is what needs to happen.
It can't be a 'shock/awe' thing, it has to be gradual, like everything else between Ollie and Dinah has been for the last year or so.
With that in mind...
Pieter and Dinah forever!