it looks like your site is handling traffic which is located very far away from the BTS. Therefore, your QOS seems very normal.
What are the values for TCH DROP and HOSR ?
How many call drops per hour ?
How many incoming / outgoing handover requests per hour ?
How many good neighbors for this site ?
Last question : do you prefer to have a site that carries more traffic but with poor quality, or carries less traffic but with good quality ?
That’s a strategical choice..