Mary,
Having now sailed Dart 16's on three occasions, I've been impressed with the overall design but very disappointed at how flexible or 'unstiff?' the boat seems to be.
If this new design has all the good points of the Dart 16 - simplicity, skegs for beaching, good kick-up rudders, well thought out rig and controls - BUT (by virtue of it's new construction material) is stiffer and probably lighter, then it's going to be a 'better boat'.