This is why I maintain that a brand new love interest is the most diplomatic and best solution. No one gets what they want, but everyone gets something new.
The fanbase is split on which ship they sail, the media adaptations are split, the comics try to walk the line with both but never commit, and at least one of the three characters usually ends up looking worse for it.
And the kicker is that DC can't really put Dick with either woman anyway. Babs is being used as a solo entity, which makes a relationship with Dick logistically difficult and it's harder to work narratives around it. And as long as DC is intent on downplaying Dick's connection to the Titans, they can't use Kori either.
So find someone totally new. Ya'll know I'm all about Nightwing-Power Girl (Kori's passion and drive, Babs' brains and wit), but I honestly believe the best thing for Dick, Babs, and Kori is for DC to let all of them move beyond this "will they-won't they" faux-relationship BS.
I don't even think Dick should be single for any great length of time, because the "love interest" role is a vacuum in Dick's mythos and leaving it empty is only going to invite more indecision from DC and more annoyance from the fans. DC lacks a vision for Nightwing, and leaving the love interest supporting role empty is taking away narrative options they could be using when figuring out how Nightwing works. It's not that Dick needs a woman, but his mythos kinda does.