First thing I notice is that brown is in the wrong place. It is NOT caused by mealy, but is caused by a third mutation of the agouti gene, so it should be with the other bay type colours. The theory that brown is a black horse with pangare has been let go as incorrect, and currently it is believed that pangare does not act on black hair. Again, brown buckskin has been labelled as 'black' buckskin, which is actually another name for smoky black and not a brown single dilute.
Again, another label that is not correct - a 'wall eye' is used here to describe the white scelera that is an appaloosa characteristic, but a wall eye is actually referring to a blue eye.
In terms of the white patterns and their descriptions, it is still early days in genetic testing, and some conclusions are drawn that not everyone agrees with. For example, it is often argued if tobiano can cause a medicine hat or not, and without being able to test for splash and more than sabino one, plus knowing there are plenty of dominant white mutations we haven't found the genes for, it is a bit game to say that it does for sure cause it. Another bone I have to pick is saying "tovero" - I personally hate it, it is lumping so many different possibilities together in a circumstance when they shouldn't.
Aside from those small points, it is a good chart