I don't get this notion that Bradley ran the point after Rondo. There doesn't have to be a designated point guard if it's not warranted. Bradley frequently brought the ball up but that was mostly so his teammates didn't have to expend that energy. As far as making plays for others, that really wasn't his game or something that he was good at.
PG usually bring the ball up the court, trouble is he is a one trick pony. He can play lights out D, but he is not a PG and one struggles to really call him a SG as his shot is not reliable. He doesn't have the instincts to play PG. He has his niche D, he just needs to expand his game to take it the next level. At some points, he scored nicely, and temper all this with he is a kid, yet, very young.
I would take Bledsoe though over the Bradley of today, who knows about Bradley in three years though.