We have some information about the Trails world, and that is it. A bit of information told through the explanation of characters, took a few minutes of the episode, then the opening started, and that was it. Some name of place here, some name of place there,…
Maybe what they did in episode 3 should have been used for this episode.
Speaking of Lavi and Isoria, I got that they tried to make Lavi not become a cardboard character by having lots of interaction with the one and only person that has vivid characters in this team, Isoria. It was a logical decision, and It is probably the only thing that I could say was not bad about this episode, but can you do it and still advance the plot? Fourth episode already, and the plot is stagnant, even the world building was only done properly in episode 2, which by far the best episode of this series.
At least, it has some decent OSTs. When Lavi used her pistol to try to break Isoria free, the track that was played is good. Also, the seiyuus also did their job. Hopefully, future episodes will be improved, to at least felt like the music was not wasted on this series.