I agree that the landing of Fëanor at Lammoth should seem to merge the storylines all together. It certainly fixes the timeline at that point. But...they are still geographically disparate and will remain that way. The Sindar aren't exactly in communication with the Noldor this season.
And I agree that cutting away from one storyline for an episode or so is no big deal. It mostly depends if you leave the other story on a cliffhanger or not as to how long you can expect the hypothetical audience to put up with that. We left Thingol half a season ago, but we'd resolved the situation with him and Melian being accepted by the Sindar, so it was at a good stopping point when we cut away. 'Aftermath of the Kinslaying; no word from the Valar' is maybe a slightly more fraught situation to walk away from? For 4 straight episodes? But of course we can do it. It's more a matter of making the audience understand why they care about Beleriand again, since we abandoned that storyline ourselves for so long. It's not that we can't pull off that transition, it's that we're going to have to put some thought into doing it well, and developing the Beleriand storyline in a way that is compelling.
It's easy to have one of the multiple storyline threads be the 'boring' one - the one that whenever you switch back to it, the audience sighs in exasperation: 'Nobody cares!' Treebeard with Merry and Pippin was that storyline in The Two Towers. The audience really had no reason to worry about what was going on with Merry and Pippin at that point, and Treebeard just seemed to be walking around doing nothing particularly useful, either. They wanted the ent attack on Isengard to be a surprise, and it was (I guess), but since the audience didn't know how the ents fit into the main storyline, the scenes came across as rather boring.
Also, this is SilmFilm, not Game of Thrones. There is no audience. The point is to adapt the actual story of the Silmarillion as best as we can while avoiding the worst of Peter Jackson-style plot changes.
Hmmm. This is just an exercise for our own amusement, it's true. Certainly this isn't a real film project. Good storytelling, however, does require some thought of the audience when making decisions. You don't have to be completely formulaic, but you have to be aware of what dialogue won't make sense to the viewer, or what actions seem to occur without motivation. Some of the false dilemmas and artificial sense of urgency on TV shows is maybe not good storytelling, even if those are common enough devices to make sure the audience experiences some tension. We don't have to be gimmicky or cheap about this. We just have to tell a story that unfolds in a way that makes sense. So, when I'm asking why the audience should care about what is going on in Beleriand, I'm asking that that story be made relevant to the bigger picture of the season, so there's not a sense of 'more Grey elves hanging out in the woods, ho hum, nobody cares - can't there be an orc attack and just wipe these people out?' That's...not the vibe we're going for.
While everyone involved in this project has seen the Peter Jackson films, the goal of this project was not to set out to 'do a better job than PJ' - it was to discuss the adaptation of the Silmarillion to television.
We are willing (apparently) to make some changes that don't scream 'faithful adaptation'. We have invented scenes wholesale (particularly in Season 1). But hopefully these changes serve the purpose of telling the story and developing the characters so the audience understands where they are at that point.
And, yes, we do want to avoid wince-worthy changes to the story, but....just because we want to do a good job doesn't mean we always do. Some of our decisions are potentially cheesy, and would be challenging for a writer to work around.
Now I'm not in charge of any of this; I'm just a listener to the podcast who chimes in on occasion. But I don't like the idea of changing the Beleriand story for what seem like studio-executive reasons. IMO, the risk of audience whiplash is low. The payoff for a fuller treatment of Beleriand is big.
None of us is in charge. Well, except for Corey Olsen. This is his project. But he does like input from the listeners, and certainly if people can make a good case, he's happy to consider suggestions that contradict his own original ideas. And, if you wait long enough, he sometimes forgets what his ideas were and completely changes his mind.