Yeoman Janice Rand never quite worked in Star Trek, as it evolved in the original series, but that's at least as much the fault of Roddenberry and the writers as any serious fault of Whitney's.
That said, she was part of the family, and it's sad to see her passing. Her desire to be known for her alcohol recovery — as an inspiration for others — is worth noting.
Thank you, Yeoman. Carry on.
http://www.nbcnews.com/pop-culture/tv/grace-lee-whitney-yeoman-rand-original-star-trek-dies-n353001
http://www.hollywoodreporter.com/news/grace-lee-whitney-dead-star-793031
http://www.geeksofdoom.com/2015/05/03/star-trek-grace-lee-whitney-died