According to the article from DisplayMate, the the average color error (from sRGB) of the S7 Edge is 1.5 JNCD and broke the previous record for color accuracy. I see no evidence that Samsung was unable to properly calibrate the S7 Edge display in Color Management, as it had the least average color error for smartphone displays at the time of review.
I once bought a Pioneer Kuro 50" Plasma TV. It was, at the time, heralded as the most accurate set available. Display Mate and others did their tests etc and several AV mags used the TV as a reference. It cost me £2700.
I sold it at a £900 loss 6 months later.
Never got on with it and honestly never understood what all the buzz was about. Whilst blacks were deep whites looked ... not white. Worse, in scenes with a lot of white content the brightness dimmed further. The thing also buzzed in tune with brightness levels.
The test reports didn't or hardly did touch on these well known problems often discussed on owner forums.
Moral ... don't believe everything you read.
I also feel that for me a good LCD still has the upper hand in naturalness picture wise overall compared to Amoled which, in comparison, seems over saturated. (I use basic mode and an app called Screen balance)
Other than that, I think the S7E is a good device and I probably will use it another year.
My next phone will likely have an LCD display though unless Samsung change their Amoleds in some ways (or introduce more versatile screen adjustments)
Saturation levels may well also depend on the resolution
If every pixel is used you likely get more Saturation. In Nougat you can lower resolution to HD. I haven't updated yet as I want more S7e user feedback on A7 (I have exceptional battery life on MM and no issues).
I would be interested to hear if anyone noticed less Saturation with reduced resolution, ideally backed up by measurements.