Color and pattern noise give us an idea about sensor performance, but they are not taken into consideration when calculating DR. So you should leave Noise Ninja checked on at default setting too (chroma NR 50) and look at the luminance noise. Make sure that Detail slider is set to zero as it tends to enhance noise. Now throw in D7100 (DR 13.9 according to DXO) in the mix and see what happens. You won't see much difference in noise. So, I don't know if we can take this test too seriously to get an idea about DR. We need proper shadow lifting and read noise measurement. Other caveat is that 7DII is not supported officially by any RAW converter yet, we can't really rely on these tests.
Something else I have noticed and not sure what to make of this. Take this 3 cameras, do above adjustments, but leave the shadow slider at zero. Export the JPEG files to LR or CS and adjust exposure by +1 (or save as JPEGs and open again with PN and adjust exposure by +1). Now look at the cup, it is darker in 7DII file compared to other two cameras. Look at the whole scene, everywhere 7DII retains more color and detail (except for overblown areas) compared to 7D and D7100. Is it because 7DII scene is slightly underexposed? Lighting has changed? RAW converter needs fine tuning? Something else?
Ok, I agree, lifting the shadows might not do what i expected it to do. For a proper comparison we should use other programs where whe know better what happens. Also the scene here doesn't contain the amount of dynamic range we need for a proper comparison. The bright shadows of the 7D are weird, maybe the program has a wrong offset for black... don't know.
What we can say for sure though, is that the 7DII has better shadow noise than the 7D.