They threw together a bunch of contradicting studies, assigned weights without discussion of the assigning methods and parameters, then decided on an average and declared it a fact, instead of being honest and saying "we don't know either way". Based on this overall pattern i don't think i have much trust that their decision making process wasn't biased.

As for incomplete. I'm sorry, but there are no two ways about it. Incomplete means to be missing a part. It is. How important this is in the big picture is a different question.