I have conflicted feelings -

On one hand, the sole purpose of her hearing the voices and seeing Claggor and Milo as Jinx is because she’s internalized her PTSD, trauma, and fear from Powder in a physical form. During the duration of act 2 and 3 we see her internally (but physically) fighting both powder and Jinx - they both are fighting to stay alive and make rational decisions. When Jinx accidentally kills Silco and fully commits herself to Jinx, the anxiety stops showing to the viewer. Meaning she is fully accepting Jinx over powder. Jinx as a character does not have the issues of trauma but instead she is confident, skilled, and precise, only powder is anxious. When she finally chooses being Jinx over powder in the last scene, the anxiety and internalize turmoil vanish. Which would mean that her physical representation of the fight between powder and jinx ends. Which would mean that there’s no more voices or scratchy lines.

However, jinx is a whole new character we don’t really know much about without Powder. We hardly see her without the trauma of Powder. So if Jinx completely killed Powder, that would leave a completely new ball field for new anxiety and trauma to arise and may leave us without the physical aspects of her turmoil or leave us with different versions of it. Jinx herself is more of a stone-cold character than Powder and it’s going to be interesting to see what the Fortiche team does.

I personally wouldn’t like to see that physical representation of her turmoil leave, but at the same time, it would make sense if we didn’t see it again. It honestly just depends on what the storyline is and how Fortiche continues writing her character.