The scene with Megan for instance where he was only thinking about how she could be of use to him and nothing else. I see the current winning option as supercharging this problem.
Funnily enough, I see the Monster route as being far more damaging. How can you grow to love others if you cannot even love yourself? He'll become the epitome of an edgy, socially irascible teenager until he snaps out of it and realizes that he
does deserve to live.
The fate of those who trusted the Flamels is not his fault. With the Monster route, he is accusing himself of the crime of being born; how could you possibly think that is acceptable? A hump to get over? Are you serious? He's a thirteen-year-old boy, for crying out loud!
And on that matter, his "disregard for others" is just basic social awkwardness. He has clearly shown a capacity for love, an interest in the world--he wants to live. How many adults can say that? How many people here can remember clearly depressive episodes, of apathy and self-loathing? I know I can, and I wouldn't wish that kind of self-doubt on anybody.
You want to take that love from him so he can struggle all over again to get it back.
I can't fathom why.
"Live to the fullest for their sake."
That's a second-place commendation, a pat on the back. That's giving up, and thinking "well, there's nothing else to be done. May as well feel bad about it and pick ourselves up later once we get it all out."
The Flamels stitched a soul together piecemeal to give us true life. I look at that and think, "we will do better. It's what they (the souls) deserve."
You say you want character development? You wish for a driving goal, to make Jacob better? Here's an idea; Jacob's driving goal will be to understand life, to study souls, and to one day create his own soul from scratch, so that he can finally set
free the ones that went into his making. That's taking the success/failure of the Flamels and making it
better. That's the best possible route, in my mind.
He can give those souls the respect, reverence, thanks and
peace that they deserve.
The legacy of the Flamels, for better or for worse, has been passed onto him. I want to make something of it, something superior. If you hate Perenelle so much, then outstrip her. Surpass her in every way. Do what she could not, rectify her mistakes, and add more good to the world than you take.
Edit:
What kills me the most on the Megan argument though is that it's not that Jacob isn't perceptive--he actually noticed her new earrings.
He's just socially inept and didn't realize it was something he should've commented on. He's not a super charismatic social butterfly; he's styled himself as an observer, and is a fairly quiet guy. It's mentioned repeatedly that in previous years, he was a loner generally regarded as kind of nutty.
He isn't used to having friends that are his age, and it shows. His "disregard for others" as you put it is just him not picking up on social cues. The socially awkward, foot-in-mouth teen is eponymous, and Rasa has stated that they hope to be able to move past that.