And Dragonborn having darkvision is going in the wrong direction imo, continuing to make darkvision too common. I wish they would bring back low-light vision and give darkvision only to subterranean races.
While I agree that Dark Vision is too common in the Player's Handbook that doesn't really excuse not giving it to races that should have it. Dragonborn are meant to fill the niche of "player acceptable dragon race". Them not having Dark Vision like dragons and even kobolds doesn't feel right.
Personally if I were to remove Dark Vision from someone it'd be the non-Drow elves. They have no real reason to have it since their people aren't nocturnal and tend to live in well lit, glowy cities filled with magic light. It's purely a carry over from low-light not being a thing anymore.