Sometimes I really do crave that AC2-B AU, where Giovanni and his children survived and were freed from the impersonation, and Giovanni is still Grand-Master, and Federico is assassin too and he's working alongside Ezio. And their family gained their position in society back, and orders are still fighting each other, yeah, all shit. Pazzi are alive too, but! In that one particular outcome Vieri is indeed a stupid young guy who has no idea that his father and uncle make him fight into shady shit and all of that it's just something political between their families or something.
And at some point Giovanni gives Federico an impossible at first thought mission: luring Vieri Pazzi into believing Federico betrayed his family so he would give them information. Buuut, ironically, it turns into some Romeo and Juliet shit, and they have to figure that out.
Boy I wish I had resources to write at all to try and make even small thing on that one. But not now... Not now...