I found the events in this update to be "Essential" to the story. What we had so far, was a trio made of 2 people. Emilia was a nothing burger, there only for the most basic functions.
Now, after she found her voice, things are already changing. Both the MC and Maria are now aware that they were ignoring her, assuming her, discounting her. They are in an unknown land, a land where Emilia survived for 1 year, some of it alone.
I think that the fact that they HAD to save her when they found her, characterized their relationship so far. It was about time that they opened their eyes and started to see her not as a rescue, a favor they had done, but as a valid and important member of the group.
Ashing away the feelings that were under the surface, such as Maria's jealousy and Emilia's love for the MC, was a great way to heal the group and make them closer.
Most of you are looking at this episode as a "bridge", it is NOT. It is a precursor, a catalyst and the first part of a catharsis that was fundamental to this story, whatever romantic route you decide to follow.
Very, very good story crafting.
Peace