Mittar,
You should know that that tree is very young in its development and the foliage as you see it is somewhat undeveloped. What you see is created by the fact that the tertiary shoots are still too short, keeping the leaves too close to the secondary branches. In time, the foliage will stand up a bit more, adding a sense of maturity to the appearance.
Note also that this tree is not to be displayed in-leaf so the foliage is not important to this bonsai. It is meant solely as a winter silhouette display bonsai. It'll take a couple more years to finish out the right side and have sufficient maturity.
Kind regards,
Andy Rutledge
www.bonsai365.com/
zonen 8, Texas