Definitely makes it pop forward a lot better. Great job.
And depending on what sort of root structure you want (i.e. how deep into the ground do the roots go before they begin to spread) you will either make the roots gnarl as they go into the ground (perhaps a little above the earth even), or, like in the image you have there so far, the roots go almost straight down into the earth before they begin to spread out a little, though not much at all (more like an almost-closed umbrella) as if they've got a tight grasp on the earth, though if that tree were ever pulled up out of the ground, it would come out almost like a toothpick. Just some food for thought.