Here is what I mean.
If you look at the Case Study Fastback, which is clearly the model from which he worked, the two main aspects of the bed are movement and light. Movement in that the slant of the bed and legs make it appear to be in motion, and light both in the enormous amount that the bed lets into a room by taking up so little space, and in the impression of being physically light.
The Traci, on the other hand, is a slanted bed that creates an impression of heft without real solidity, and darkness without any romance. It is like he took a really good model and said "Americans like overstuffed, oversized, solid furniture." It is incongruous with the original idea, and the result is silly looking. While the fastback looks like it is going to take flight, this one looks like it is being weight down and is going to topple backward. It strikes me as right out of the handbook of Interior Desecration as contrasted with good design.
FWIW, the best copy of the Nelson bed is the Jasper Morrison "Bed. It incorporates all of the feel and image of the original while increasing the comfort and using shapes that are more contemporary, yet not losing, even enhancing, the minimalism and the feeling of movement and light.