I think she says those Slams are her priority and especially Wimbledon because it's her favorite but also because she didn't have as good results last year on those two. But I think she knows she has a great chance on clay and is ready to work
You could tell from her latest PCs during IW and Miami. In IW she was asked about the courts and how slow they are and she said it was good preparation for the clay and in Miami she was saying how excited she is for the clay season. So I think it's a good sign she is thinking about it.