That's one reason why a City Elf in DAO never made it past the origin story. I found the idea of them being sufficiently gifted in combat to be the HoF too far-fetched.
Well to be fair the game suggests you had some training from your mother. Secret training I would say cause CE are forbidden to wield weapons. Not that this would totally prevent crime and fighting. Weaponless peasants still had Jacqueries regularly. Prisoners in our world are not supposed to have weapons but murders and violence still happens within prisons walls.
Even with the above, I still prefer having as bare bones information as possible. I can give a clear example. For the non-mage Trevelyan, the tarot states that the youngest child goes into Chantry service as a family tradition. It seems to me that if they had a prologue that that background would be more filled out, with the Trevelyan PC being slated to join the templars, or a new templar recruit, or something along those lines. While the templar specialization is for warriors as a game element, there are rogue templars and they even have their own model in DAI. But what if I didn't want that for my PC? What if I wanted his parents to procrastinate in order to keep him around? Having that bare information allowed that to be my choice.
I don't see how having a pre-Conclave explosion prologue would have necessarily forced a choice regarding the link your family have with the Chantry.
I could easily imagine a conversation happening with one of the guards of your delegation where you can choose the following:
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Guard:
Damn! Pardon me my Lady/Lord but Haven is so cold! I'm even beginning to miss Ostwick rain (possible info about Ostwick, coastal city)
PC:
1. At least the snow is pretty
2. You're as charming as ever
3. Quit complaining
4. This is a freezing dump (well you can say this to Josephine, but you could say it TWICE)
5. Etc...
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Guard:
LOOK. They hired QUNARI mercenaries, Chantry is really out of its mind (info about Ostwick, known to have historically repelled many Qunari invasions)
PC Reactions ....
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Guard:
I can't believe you accepted the trip (...)
PC:
1. Wasn't like I had a choice
2. Try to enjoy it
3. Higlights again how duty bound they are to their family
4. Etc
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Guard:
Anyway, I doubt the Sparklers and Templars will agree on things, but maybe this trip will prove useful to you.
PC:
1. My templar training is beginning soon/occasion to meet some of the Templar hierarchy (Templar PC)
2. Lending a hand THIS time so that my parents continue financing my lavish lifestyle (Non-Templar, Slacker PC)
3. I have duties towards my family (Non-Templar PC, invested in defending family interest)
4. Mommy and Daddy will be happy enough I get home safe and sound (Sheltered PC)
5. Add more options....
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Those are just examples, and proper writers (which I'm certainly NOT if you didn't guess
) would provide far better dialogues
I already expect people to come out and say BUT THIS TAKES TOO MANY RESOURCES ...YOU HAVE NO IDEA HOW WRITING WORKS IN THE GAME (which is true, I don't know their process and I'm no writer)
But that's more or less what I want to see regarding roleplay opportunities in a summit prologue. It doesn't even need to be very long. You don't even have to meet too many family members (thus not defining too much things) and the dialogue could quickly move on to expressing your character feelings towards the Conclave and its possible outcome (which is more plot related and neutral rather than background related). Have the opportunity to meet the Chantry representative of the Free Marches cities who can give you more infos while gushing about Justinia, see Chantry folks doing business on the side with shifty Dawrves, scared mages, whinny mages etc...
And Grumpy guard could have been part of a sidequest later, turns out he survived because he was out in the forest, drunk out of his mind and you decide what to do with him as Inquisitor.
I think those kind of options give plenty of choice regarding the PC characterization.