You can't stop change. Don't let it stop you.
There are two ways to improve your service, and yourself: maximize your strengths and minimize your weaknesses.
If you were a customer, would you come back to buy your products or services?
Are you doing only what you must or doing all you can?
If you're always doing what you've always done, you'll never see (or become) what you could be!
No one ever delighted a customer by being 'good enough'.