It`s important to notice that is not just my personal opinion or personal taste. These images have so much red that the entire line of professionals I work with are asking me to correct the colors and as I sad before that`s definitely a red flag.
Having sad that I do not know yet what the cause of this problem is, might even be the photographer and not the camera!
Overall I would say that the reason is a combination of many elements first of all applying a workflow that has been working for years with a different camera system to this new camera system. Canon raw files too require a fair amount of color adjustment but after 10 years of everyday shooting and post production it became second nature to fix them in few clicks.
Also important to notice is that I shoot a lot of jewelry and clients are super demanding about getting absolute correct colors (adding some yellow to a diamond makes a 100k stone look like a 1k one....but if you add a slightly different kind of yellow it suddenly becomes a "fancy diamond" worth 1Mil ! Needles to say that when I shoot food or landscape there is much more tolerance about colors.
Some of the Color Profiles suggested by other members are making the images look much better and it`s getting easier to find good natural colors.
R.