Cha checks and Con STs are not that good. The way racial AC boosts are, it only helps if you don't wear armour. They already have a breath attack that's bad because it doesn't scale well. A bite/claw attack will just be version 2.0 of that... aside from competing with said breath attack on how often you can case use it, probably.
What's bad about Cha checks and Con STs??? Con STs are one of the Big 3 saving throws and Persuasion/Intimidation checks are huge in a D&D game, especially as one as full of dialogue and characters as BG3 looks to be. They're also features present in other races, in some form. E.g.,
- A full Dwarven feature is devoted to Con ST-related things (poison)
- The EGtW Dragonblood gets Forceful Presence - Adv on one Persuasion & Intimidation check per day.
Not the way I was suggesting a boost to AC. I was suggesting a +1 bonus on top of any armor. But also, these are just sample suggestions I thought of in a minute and serve more as ideas of areas that could be turned into Dragonborn Racial Features. My main idea there was [some form of damage prevention].
Larian could make the breath weapon and/or claw attacks scale better then. There's no reason for them to not scale?
