That'll be a -1 from me. Too many races get Darkvision in 5e - so many that it becomes more common than not, and turns not having darkvision into a punishment rather than darkvision being a nice boon. Give dragonborn something else unique instead of darkvision, unless you're going to give every single race darkvision.
Out of the 9 PHB races, 6 races (Dwarves, Elves, Gnomes, Half-Elves, Half-Orcs, and Tieflings) get Darkvision, while only 3 races (Dragonborn, Halflings, and Humans) do not. And then 3/4 of the additional BG3 races get it: drow, githyanki, duergar, deep gnomes.
Imo this problem stems from removing low-light vision from D&D, and then (somewhat arbitrarily) deciding which previously low-light races would get darkvision vs normal vision. Why do elves, half-elves, half-orcs, and gnomes have darkvision?!? Their races haven't, as a whole, lived underground for hundreds+ of years.
Unfortunately, there is not much that can be given to Dragonborn and humans to offset it. Or, rather, Larian chose to give nothing to humans. Dragonborn just sit in the vast void of having little going on for them.
Because Larian won't nerf half the races, in my opinion, the only option left is boosting the Dragonborn.
