A lot in my article is not made with "true" paleo in mind. I addressed in the first part of the article that I was not going to cover specific modalities of eating such as high carb, low carb, paleo, etc. For this reason, Milk and beans are still on my list, though they are not paleo in nature.
Most people when getting started need to get on the right track. Personally, I am somewhat against Quinoa because it is a seed/grain that is high in caloric density. The GI of Quinoa, however, is very low and it has a relatively high protein content that helps to buffer absorption.
I have been rethinking this approach, though, and may remove Quinoa all together since it is easy to overconsume on Quinoa. However, when just improving the quality of food, something like Quinoa serves as a nice "filler" to replace things like rice and bread. I think I may remove quinoa from the list though due to caloric density, though...
Grains, in general, should be avoided for a lot of reasons with few exception.