I took another look at the GANTT chart.
I think if we make Episode 2 Aredhel-centric (her departure from Gondolin, journey through Nan Dungortheb, visit to the Fëanoreans, and up to her entrance into Nan Elmoth), that will get her story off to a solid start. We can then tell all of the Nan Elmoth story (getting lost, meeting Eöl, marriage, birth of Maeglin, raising him while 'trapped', etc) over the course of the season in various episodes. Then, we will need a later episode to be focused on Aredhel, most likely Episode 11. That will be her return to Gondolin and death, setting up Maeglin in Gondolin for later. So, Episodes 2 & 11 are focused on Aredhel, and she appears in various episodes between those two.
If we do it this way, we should have plenty of room for our human-centric stories. Like so:
View attachment 3018
House of Bëor is the primary plotline of Episodes 1 and 8.
House of Bëor has significant plot stories in Episodes 3, 9, and 13.
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House of Hador is the primary plotline of Episode 7.
House of Hador has significant plot stories in Episodes 6, 8, possibly 9 and 12.
View attachment 3020
House of Haleth is the primary plotline of Episode 4.
House of Haleth has significant plot stories in Episodes 5, 6, and potentially 9.
This is a proposed breakdown of the episodes, not a final one, obviously. As we move on to planning the elven storylines, though, it's important to keep in mind how much 'space' the human plotlines are already occupying. It's not a problem (yet), but we really can't put 3 very important stories all in the same episode and expect to tell them well. Questions such as whether Haleth settling in Brethil happens before or after the Council can certainly be addressed. Mostly I just want to make sure we have space for it to happen somewhere.