I think the immediate implications are that there are correlations or juxtapositions between Hap's Captives and Prairie's new group that act as counterparts that work in such a way to make the movements possible for Prairie to use...
French and Homer share the idea of being young athletes, who both come to suffer head injuries, but obviously Homer's being an NDE, where French's is just a scrape from fighting with Steve.
French also has a correlation with Ranetta in the sense that his nickname is exotic and Ranetta comes from an exotic location, but Ranetta shares Prairie's extraordinary gift to play music, which solidifies the irony that Homer is used as bate, but then sleeps with her, betraying Prairie.
If one looks at Rachel, her vocal musical abilities tether her Buck, who sings in the school choir, but the story about her running away from her parents to raise her younger brother, whom tragically dies from a car accident, juxtaposes Jesse's story, as one of his parents died, the other left, and he's currently being raised [poorly] by his big sister.
Betty Broaderick-Allen or "BBA" has a cool name abbreviation like Prairie (The "OA") and both are "teachers" of sorts. She also just lost her brother Theo, who was hard to handle, but finds her brother again in the forms of Steve and perhaps Jesse.
Steve also starts to find someone, the girl from detention, where he can be more of himself with, as she is more like him. This is not unlike Prairie coming more into her own when she was held captive and finds and meets Homer.
The show's contrasts of counterparts is so beautifully sliced and isn't perfectly symmetrical.
In terms of the longer term implications, I think the series will take it's time with it.
I do think French believes he saw Homer in the mirror, making us aware that they share some things and that perhaps French plays a bigger role in terms of saving Homer at some point. But I also know that Brit Marling has a 5-season plan and that she doesn't want to simply repeat herself. So it may take a while to see the full magnitude of what this Odyssey and all it's little parts bring.