I think the "gotcha" moments they were going for were the flashbacks providing revelatory context to what was happening in the present. This strategy is designed to build suspense and works well (and accepted more easily) with other conceits like sci-fi/time travel but on the face of things, that technique is really just a writers way to deny/delay information to a reader/audience in order to manipulate them into accepting a payoff/reward. Like I said, they were trying to be "too clever" not that it was clever.
Hmm, I'm still influenced by what we did get and how that failed/ how most reacted negatively to it to be convinced that revealing the doctor Joel killed was Abby's father only when they meet for the first time (and quickly ending up in Joel's death) would help improve others accepting Abby straight up. Without knowing the inciting incident for Abby's actions, there's no way for the audience to begin contextualising nor wanting to see Abby's POV. All you'd get is people asking "why am I following this character for so long in what is supposed to be a sequel/continuation of Joel/Ellie adventures?"
I'm of two minds when it comes to narrative "twists"/surprises these days and how effective they really are. These days, twists are employed often as shock or revelation when they should be a natural/reasonable culmination of what came before. A story that can't stand on it's own with or without a twist cannot be appreciated for long. If the twist is so pivotal to the understanding of the story, it will eventually be seen as an out-of-universe /Doylist manipulation of the viewer by the writer and will most likely cause more fridge moments/plotholes to be discovered should one scrutinise the story more. Not exactly sure what you're getting at with the reference to WoL. The reveal of Mengsk letting Tychus go and "manipulating" him has no bearing on the entire story until it does so conveniently and right at the end to force a contrived confrontation and the ultimate death of Tychus. No-one (both in-game characters or the audience for that matter) feels the Mengsk connection is of any significance (we're supposed to believe Mengsk really allowed the stuff regarding the Odin to just happen?) until the story forces us to consider its significance - which is kinda cheap and rings of falsehood.
I'm not sure what you're getting at. The inciting incident for Abby's character journey is the death of her father - much like how it is for Joel with the death of his daughter, Sarah. Unlike Joel, Abby has a specific thing to direct her ire against and something to work towards (finding Joel) but like Joel, she distances herself from everyone around her (which we get to see here - through her friend/lover Owen - but is only inferred with Joel in the first game) while going about their life. If we followed her from the beginning, there's no reason to think of Abby as a "psychopath". Ellie on the otherhand...
How so? Ellie has bided her time and prepared herself for years to both find and confront Joel (sidenote: I still chuckle inwardly at how people can't believe Abby's swoleness being possible over time what with the resources WLF had whilst yet happily accepting the existence of fungus zombies). There are no reports from Jackson that some phantom killer has been slaughtering there way ever closer to them. There is no evidence that Abby is murderous to anyone other than Joel since she let's the brother of her enemy and a girl who murdered several of her compatriots to find Joel go (of all things!) and was actually prepared to go alone to confront Joel (which not only reduces potential deaths of her fellow WLF colleagues/friends but also collateral damage of Jackson residents where Joel resides) In contrast, Elly spends little time to prepare and goes on an instant killing spree in response to Joel's death in comparison. Who's more psychopathic of the two on paper now you think?
I think the first TLOU has more of a heavy influence from Cormac McCarthy's The Road than Children of Men. I don't necessarily agree that TLOU2 is without levity/hope and good things. Just look at how Jackson is turning out. Sure, things go to shit for Ellie and co. but the town appears to be thriving and there's "normalcy" coming back there.
This kinda makes me wonder whether what they were also going for with Ellie was that it was not only vengeance for Joel's death and her shame for not being able to forgive him but her way of exacting vengeance/working out her frustration on Joel (through Abby as an expy of Joel - which the game attempts to build) for taking her choice away from sacrificing herself in the first game.