The option to play as a Dragonborn was the deciding factor for me as to whether I was going to buy it. They look great, but their race perks are terrible.
Dragonbreath is completely useless starting as early as level 2, it does pitiful damage, doesn't even create elemental surface, and requires a full rest for every cast.
The defining trait for an entire playable race really shouldn't be a wasted slot, but in its current state it is literally useless and may as well not exist.
That leaves Dragonborn with a single unique trait that actually does something.. which is a bit if elemental resist... yay. Highly situational and not nearly as practical or impactful as the traits of other races. Picking a hulking dragonman should really not feel like a self imposed handicap, but it currently does.
Honestly dragonbreath is so bad that it feels like a mistake or oversight, but an appropriate buff would be an easy enough change to fit in a hotfix.