In the Ace version of the game, there was only one scene where Shoko has speaking lines. In this game, while I might be in the midst of writing the scene where she has her first speaking lines, I will not discount having future events where she has speaking lines. Though, if she does, they will likely be short sentences, given her personality. Maybe, when the optional skits come together, she will be more comfortable with speaking more if you have a high enough rating with her, but that's definitely an idea on the "later" pile!
Though, if I am to be honest, Shoko is a character that is close to my heart for various reasons. Because of this, I'm inclined to be cautious with her. Like, she's a broken bird to begin with, and I want her path to be one of healing. While the source of her trauma may never be explained/relayed in this iteration as it was in her Heartache iteration, or in the Ace iteration of this game, it is still very much present.