I realize that Bereg is from the House of Bëor (we were just discussing how to show onscreen his descent from Bëor). I have the Council listed under the 'House of Hador' storylines (rather than the House of Bëor storylines) because the key character in that entire sequence is Amlach, not Bereg, and the key question of 'should we sign up to serve the elves or not?' is a question the House of Hador is struggling with. I would be happy to delete Bereg from the GANTT chart entirely, since he's such a minor character, but figured 'Men leave Beleriand' is a significant enough detail to leave him in.
I imagine we will want to use Eöl's relationship with the Dwarves to illuminate the Dwarf-centric storyline this season, whatever that may be.
As far as I'm concerned, the main reason to have Annael's treachery as an early season event is because we want some time for the elves to react with suspicion and for him to choose exile. We can't really do that in the middle of the battle aftermath without making that feel tacked on. It's important to remember that the Rhogrin, Annael, and Díriel storylines are all villain storylines told from the elvish perspective. So, it's fluid where in the Season that all happens, but it does have to fit with other storylines, and likely needs to be resolved by, say, Episode 11.
As we've discussed in the past, the fighting at the Pass of Aglon falls in different places in the chronology depending upon whether or not the additional 200 years (and extra generations of Men) have been added to the timeline. As a very minor event that didn't make it into the published Silmarillion, we have the freedom to delete it entirely, or insert it wherever we might want it to appear. I know you have made arguments to involve Hador in that event; originally, it's meant to be the House of Bëor that's involved. We'd have to figure out the purpose for it to place it chronologically - is it showing that Men can successfully fight orcs for the first time? If so, it needs to predate Haleth. Is it showing that the House of Bëor is willing to fight alongside the Elves? If so, it should happen fairly early in the Season, as the 'all in' attitude of the House of Bëor needs to be demonstrated up front (and, in our telling, probably during the lifetime of Bëor). Is it being used to demonstrate that the House of Hador is willing to throw in with the Elves and fight alongside them, after much dithering on their part? Then it should happen much later in the season (no earlier than the halfway point), and probably be geographically relocated to somewhere the House of Hador...is, and not the Pass of Aglon at all. But the whole point of utilizing a GANTT chart is that an event can be shifted into any episode without reworking the list.