When you take a look inside the Marantz products you see the cheap parts. This proofs how limited they are. The company who does the technical support of Marantz in my country told me hoe poor the parts are they use.
I would highly caution everyone reading something like this to not automatically take this comment as a "fact". For example, I have looked at the internals of the AV8802 processor and I have not seen any "cheap" components. The Marantz does use a very slow op amp for I/V in the DAC section of the AV8802, which definitely contributes to the Marantz warm voicing. However, the layout and design of the DAC board is excellent with a large number of localized power supply filter caps. Of course, the caps could be upgraded to something like Nichicon Muse or Polymer (for digital), but you have to realize that this would significantly increased the retail cost of the product. All the components I have seen are pretty good components. It is certainly not cheap components like Emotiva.
As you go up in the Marantz models, the more expensive units will use better components, but they are always voiced as "warm", which may or may not be what you are looking for. It doesn't mean that Marantz is cheap or bad. It is just the "Marantz voice".
As far as Calman 2017 goes, it is software used as a tool to help calibrate video displays. The "calibration adjustments" are dependent on what is used to modify the video signal to make the display show proper colors. The adjustment capability depends on the device. The Marantz AVR may have some color adjustments available (hugh / saturation / white balance). The display itself may have some. These adjustment are usually not enough to give as good results as something like a Radiance video processor or another color cube correction device.