So, with Patch 1 now live, Dragonborn's breath actually scales now. That's a good thing, but the rest of the race is still below average.
In fact, I would argue that Dragonborn are probably the worst race right now, even worse than humans and half elves, who get simple armour proficiency and shields, which is great on classes like Wizards and sorcerers.
In comparison, Dragonborn get no darkvision, no skill proficiencies, no advantages, etc.
All they get is a resistance to a single type of damage and a breath weapon once per long rest.
In comparison, new variants of Dragonborn from Fizban's Tresury of Dragons get:
1. Breath Weapon. When you take the Attack action on your turn, you can replace one of your attacks with an exhalation of magical energy in a 30-foot line that is 5 feet wide. (Chromatic). Usable once per turn, can be used a number equal to proficiency bonus, recharges at long rest.
-This makes them viable for fighters or any other martial class, as you can do some AOE damage and not use a whole damn action for a skill, that is often weaker than Burning Hands.
2.Draconic Resistance (same as current dragonborn, so no changes needed here)
3. DARKVISION
4. A level 5 feature like Chromatic Warding or Metallic Breath Weapon, both of which give some extra stuff at level 5.
So, please, add more stuff for them, both dialogue and mechanics wise.