The images issue has largely gone by the wayside for me. I think the greater majority of these images have already been seen widely over the years and even those few rare ones I don't recall ever seeing are rather small and printed in commonplace black-and-white. They don't impress as anything special. It might have been different if they had been reprinted in large size and in colour on nice glossy paper, but that isn't the case.
The low quality of the images is probably a mix of two factors. One, the book was self-published, not the work of a professional outfit. Just compare the quality of the images in TATV to those in the Solow/Justman book (which is, for the most part, also black and white). It's like night and day. Two, since the author never contacted the fans who originally restored many of the images for permission, he also never got the chance to include higher resolution versions of the images.
It seems likely to me that the images weren't a part of the research process, and were only added to break up the text after the fact. Don't believe me? Take a look at the excerpt about "Who Mourns for Adonais?" which has been posted online.
The text says, "The entire [first] day was spent on the Stage 9 bridge set. Jerry Finnerman was out sick this first day and replaced by Arch Dalzell." The images tell a different story, which lead me to echo Indysolo's comment -- if Cushman can't get the stuff right that we can easily verify, why are we assuming that he got the stuff right that we can't?
(Can't claim credit for this observation -- it came from a blog reader).
In terms of typos and grammatical errors sadly it's not only this not being the first time I've seen such things it also seems to be becoming more common. I see such mistakes in newspapers, magazines, professionally published works and it's all over the internet in supposedly professionally presented writings.
Mistakes happen, but the typos in the first edition of volume one were truly embarrassing, and hardly the work of a professional. I hear volume two has been much improved in this regard.