Both the 35LS and 40-80mm are all new and both appear to excellent but both carry a high the price point and weight/ bulk of the lenses is a lot.
I believe the 55LS and 110LS are all new designs. As is the stellar 240LS. I have the much cheaper and lighter 210 AF which is a great lens extremely sharp.
The 28mm, 75-150, 35mm D, and 45mm D are all reworked from the earlier Mamiya versions.
Some the glass is excellent even in the older Mamiya makes, the 75-150 and 120 macro for example and the 210mm.
Phase has come a long way with these newer lenses. If the 35LS had been around in 2011 4th quarter I would have purchased it in a second and stayed away from the tech camera route. Even with the DF+ body.
Paul