They won't get into the Good Place, but they won't go to the Bad Place. I don't think it will be a Medium Place either. One of the things the creator of the show mentioned in interviews is that the main takeaways from the show he wants people to have is a) what we do on Earth matters b) even if you don't succeed, it is important to at least try to be good, because not trying is much worse.
So if you take into account season 3's "Earth redo" experiment, and the fact the actress who plays Tahani mentioned she was "devastated" by the ending at first but still found it funny, this is what I think happens: After the experiment, they acknowledge that human souls can improve. So the solution will be that after people die, unless they have a shitload of negative points or a shitload of positive points, they will go to a "soul rehab" and then get reincarnated to try again, the idea being that an improved soul will let them maybe do better next time around...which was evidenced by the redo on Earth in season 3.
So I suspect that the squad all get reincarnated, but as a perk for running the new experiment, they get to pick who their parents will be. Jason will pick Blake Bortles, Tahani will pick her sister, and Chidi/Eleanor will pick something where they grow up as neighbors or whatever. Then maybe there is a flash forward when they are kids and they all meet up and all have some unexplained connection to each other.
Alternate is Chidi + Eleanor stay in Soul Rehab to help others perhaps? That is my guess anyways.