@capnbobamous I've seen this suggestion a few times but I don't agree.
For me, the entire point of playing as Ellie first is to make you empathize with her. Especially if you've played the first game and are attached to Joel, the experience of watching your beloved "father" being brutally executed in front of you, especially in what seems to be an arbitrary act, is so revolting and infuriating that you the player will be in the same state of mind as Ellie the protagonist.
Therefore as you play through the first half of the game, you approve her actions, you want revenge as much as she does, you hate those assholes. Of course, you've seen snippets of Abbie before the murder so you know deep down she must have her reasons, and you suspect it may be related to Joel's actions in the first game, but still, those assholes!
As Ellie continues her rampage you slowly start to question her actions, detach yourself from her, maybe this is going too far, aren't we killing way too many innocents at this point?
Then they flip the script and show you what you were fearing all along: Abbie and her buds were actually perfectly fine people, Abbie's dad was senselessly murdered too, the exact reason why you went on a killing spree, so how dare you judge her? And the more it goes, the more you get attached to these characters, and relive how you killed them all, and you feel shittier and shittier.
Until, in my case, at the end you're 100% rooting for Abbie, or at the very least want them both to stop and go their own way.
All this would not have worked nearly as well if you played as Abbie first. All these mixed emotions and inner conflicts would be lost.