Having looked through a good number of the photos I came away with the distinct impression that they didn't really know what they were at. Obviously Dorothea Lange had taken a passionate interest in the subject but she stands out from the crowd like a lighthouse in a duck pond. I searched for various items that are of relevance to what I do and found that isn't a great deal that could be considered useful in trying to research any particular aspects of the era. I appreciate that the collection is unedited (or appears to be) and that perhaps the photographers themselves would have preferred to throw out a lot of the chaff (no pun intended) but I do rather think that an enthusiastic team of LuLa contributors could have made a far better fist of the job, but then, we are now used to instant assessment of our results and can modify our technique accordingly, something which would have been of benefit to the photographers of the 1930's who would no doubt have appreciated being able to do the same.
The other feature of the collection that I find frustrating is that they are not viewable in a slideshow format, you either have a thumbnail or need to open a file and then close it before moving on to the next. It can absorb a lot of time having to do that.