amercer,
I see you have not read much on Lucy:
There has been a lot of discussion of Lucy's knee joint, the one found far away was found two to three kilometers away from the skull and 60-70 meters deeper in the strata. Dr. Johansen does not claim that the knee joint belonged to Lucy. Instead, it was part of another fossil he found some time earlier. He does put them together logically, though, claiming that they were of the same species.
Also you do know the lower jaw of Lucy does not fit the skull 1470.
Solly Lord Zuckerman is one of many anatomist that have said australopithecines do not belong in the family of man.
Dr. Charles Oxnard completed the most sophisticated computer analysis of australopithecine fossils ever undertaken, and concluded that the australopithecines have nothing to do with the ancestry of man whatsoever, and are simply an extinct form of ape.
Stern and Sussman also mentions that the hands and feet of Australopithecus afarensis are not at all like human hands and feet; rather, they have the long curved fingers and toes typical of arboreal primates.
Dr. Chas. Oxnard (USC) writes "Although most studies emphasize the similarity of the australopithecines to modern man, and suggest, therefore that these creatures were bipedal tool-makers at least one form of which (A. africanus--"Homo habilis," "Homo africanus"

was almost directly ancestral to man, a series of multivariate statistical studies of various postcranial fragments suggests other conclusions.
Lucy has more probelms than just the above, the question of was the bones all together in a tent at one time with finds from both Hadar, Ethiopia and form Laetoli; which in any circles of work in these types fields is a no no.
Richmond and Strait identify four skeletal features of the distal radius of the living knuckle-walking apes, chimpanzees and gorillas. They also identify similar morphological features on two early ‘hominids’, including Lucy:
‘A UPGMA clustering diagram … illustrates the similarity between the radii of A. anamensis and A. afarensis and those of the knuckle-walking African apes, indicating that these hominids retain the derived wrist morphology of knuckle-walkers.’5
The knee joint has more problem than just being found 1.5 miles away, the question of is it from the same species.
Yes I have read everything on this monkey held up by NG as a missing link after much has proven otherwise.