Yes we probably all have suggestions to improve flavor but many of them might be irrelevant or meaningless without pics of your build and/or more information or both. I'm fairly certain you will be able to improve flavor to a point, by playing with build/placement/wattage etc., how much improvement will remain to be seen.
Have you tried it with more than one
juice? As, alas, juice type and flavor also tend to play a role in some atomizers.
Best of luck, hope you can provide a bit more information.
Anna