I recently had the opportunity to sample a light colored beer with cocoa nibs and coconut. This one was a gose, so it also was tart and had salt in it. It reminded me of tanning lotion. This was in a flight of about 20 other beers with cocoa nibs and it really became work after about 5 or 6 of them. But done right, meaning noticeable but restrained, they do make interesting and tasty beers. Too much and they are just... interesting. Way too much and they become a stunt, novelty. Gross.
Good luck and let us know how it goes