Hedo ain't slowing down. He's just entering his prime. Nelson may be a better 3 point shooter then Hedo. It's pretty close.
4 assists may asking too much but we'll have to wait and see. He already gets doubled a lot and his offensive game isn't fully developed yet. Plus he is steadily improving at passing the ball out of the post. Also having Darko in the starting lineup will help his assist numbers. They are always looking for eachother when they're on the floor at the same time.