As a drummer for ten years, all of my instructors have always stressed the importance of playing what the song needs. They constantly said, “Keep it in the pocket!”
The same was true for writing. In college, professors always stressed the importance of being succinct. Seth Godin, a business author I mention frequently, is a great example. He constantly plays what the song needs. His blog and his books have definitely changed my life for the better. Check them out if you haven’t already. If you have, read his material again! Do what you need to do. Do it to the best of your ability. Play what the song needs.