I'm not sure how well they would be able to split each season into Ellie then Abby focused seasons, it might alienate viewers who have such a bond with Ellie at that point, especially after Abby does you know what.
Maybe it's the case that splitting it like that worked in the game, but I loved the game and found it hard to get on board emotionally with Abby for a good couple of hours.
Genuinely curious to see how they do it, and also if they kill Joel in the first episode which would definitely be a curveball for those who don't know it's coming. Moreso when they'll likely have to show the relationship between Ellie and Joel being repaired like it was in the game.
Either way, I'm looking forward to it, because the first series was a great representation of the game for its focus on the characters over infected. Surely the next series' focus on these characters will flesh them out even more than the game.