For Karen to continue exploring a potential relationship with Matt would be a huge step back for the character, especially after she found such a strong sense of self-confidence in Season 2.
Where romance is concerned, Karen deserves to be someone’s partner, not their afterthought.
Karen’s romance with Matt, which is seemingly the biggest reason she’s tethered to Daredevil, has included a lot of push and pull, with a slow simmer that never really sizzled.
Matt treats Karen as a back-up and not an equal, and based on his behavior in Season 2, he also seems to see her as someone he can take or leave, and not as a valuable person with whom he sees himself sharing a future.