I definitely don't know to what extent they can develop a narrative arc for him, since there are only 4 episodes left and he's only been relevant in one episode this entire season so far. Maybe they'll do the same thing with him that they did with Felix in season 4?
Like the last two episodes, "Secret Protocol" and "Nemesis," this one was written by four screenwriters. This makes me think that something might happen here, especially considering that the episodes are not in chronological order.
What exactly is the point of keeping Lila's face hidden if we've already seen her physically, as well as in her villainous form?