A well done study, but one that has as its purpose the development and marketing of yet another tourist attraction to further urbanize the Napa Valley, adding to the many impacts that are degrading what was until recently a prized rural, small-town quality of life.
It has come at least one building approval too late. From the article: "city leaders can ...consider zoning that would prevent new construction from blocking views of the river and Napa Valley edges". It was obvious that the Black Elk hotel was a bad idea from an urban planning standpoint when it was proposed (see update 7/14/17 here) and yet it was approved anyway. Coming a year after the Black Elk approval, It could be that this study was a result of that unfortunate event. (Or perhaps it was in reaction to the massive Wine Train Hotel proposed next door. Or the Foxbow Hotel just kitty corner. Or maybe it was simply a reaction to the already built, noisy and tacky "The Studio", the true definition of a tourist trap venue.)
Why do government leaders always take action after the fact - waiting for problems to become insoluble before trying to solve them?