Personally, I think a lot of theses posts asking for buffs to Dragonborn are asking for too much. Getting resistance to elemental damage is already a huge boon.
The argument that dragonborn should have the same abilities as dragons falls flat to me. These are attempts to make dragonborn overpowered relative to other races.
For humanoids, I think only Underdark races (drow, duergar, deep gnomes) should have dark vision. It really doesn’t make sense for surface dwellers to have dark vision unless they are also nocturnal and normally are only awake during the night.
I think a +1 bonus to AC or well scaled breath weapon are good options. However, I think it would be unbalanced to give them both abilities.
I admit that it's weird that Dragonborn and Githyanki have the vertical cat-slit eyes that allow higher muscle control specifically so you can see in the dark, not to mention the high contrast iris that allows for more efficient light reflection. When I first started playing I saw that, and leaning on my knowledge of biology it made me think Githyanki had darkvision - but they don't.
I'm not saying they should give Dragonborn darkvision, they are super powerful already as a race-choice plus being the #1 fanboy super-popular race right now along with Tieflings. I remember when it was Drow back in the day - everybody wanted to play one.
Maybe they just need to change those eyes so its less inconsistent with biology.
