Boy oh boy, that looks like some undertaking!!!! I think what might help the most is to look at the layout diagram that she has linked there. You can see clearly where the 25 hexagon pieces, 6 half hexagon pieces, and 6 edge triangle pieces go, and how it fits together. Each of those items are knit seperately, which means that each and every edge would need to be seamed.
As to whether these are the complete/revised instructions, that I don't know. Where did you find the revisions?? It does say something at the top of the pattern that sounds like there might be a different version out there, but the only difference is that charts for the motifs and borders were added?