My understanding is that at least among the earlier episodes this season, some content was moved from one episode to another, after the filming was complete. This might be the reason many episodes have two directors listed.
As much as I'm enjoying the show, I think it has both too many characters and too few. There are half a dozen storylines, and some of the main characters have strong connections to others, but others have almost none. Durin has Disa, his father, and Elrond. The Stranger and Nori have each other.
Celebrimbor has no one. He interacts with other characters, but has no strong bonds to any of them. He barely interacts with the smiths working under him, who mostly don't even have any lines. This is probably an intentional way to make him isolated and susceptible, but part of me wishes he had someone close to him who was affected by Sauron's abuse of him.