I see it differently.
Remember what Troy Baker said about the Last of us Part I
He understand the character in the world of The Last of Us. What he says ties in perfectly with the Last of Us Part II.
Joel has to ultimately live with his consequences for saving Ellie and not saving the world. Is it a good or bad decision? Well, that's left for us to decide.
Now we're on to the Last of us Part II.
Ellie is driven by revenge and so is Abby.
Right before the end of the game, we're looking at two characters from both perspectives. Both who were driven by revenge after losing the father figure in their lives.
This also brings us to another one of Troy's comments.
In the Last of Us Part I, we questioned Joel's decision.
In the Last of us Part II, we're still questioning it, but this time, we're taking a look at the ones he hurt, and that's Ellie and Abby.
But that's not all
I'm not sure if this is confirmed, but I will speculate. Are the religious group immune to the disease? If this is the case, then this would go more into depth about Joel's decision.
End the end, we might enjoy Abby's character far more than what's being displayed through words on our computer screen. The final parts go deep into her story and we get to understand her side. I like stories that make us question things. We cannot act based on emotions because our favorite character has died.