Hi @PitchNinja
You won't be able to add variety to Genre Stations created by Pandora. Since these stations are curated by Pandora they behave a little bit differently than personalized stations. Adding Variety could change your listening experience on these stations; and added seeds would most likely inspire music outside of the scope of the intended genre.
You can however, create a new station based on your favorite artist or track from the genre station. Then further customize your experience by using thumbs, seeds or Modes to improve your listening.
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