Rick Eid did also note that “some pretty major personal things” are in store for Burgess, which could mean a focus on non-romantic elements of her character.
Still, I’d say there are more seeds planted for Halstead/Upton than any other existing Intelligence Unit dynamic.
Admittedly, Halstead has been seriously burned by an in-unit relationship in the past, and part of what ended Upton/Ruzek was that Upton didn’t want to mix work with relationships.