Board Thread:Naruto Discussions/@comment-27662856-20180316054643/@comment-6769189-20180317085207

@Ace: The Byakugan doesn't really allow for all that much greater tracking abilities. Not to the extent the Sharingan does at least.

Byakugan also can't read minds. Neji was reading Hinata's body language. All Neji really needed was relatively basic knowledge of psychology to pull off what he did. He did the same with Naruto.

As for Hiashi, there is no sign of his Byakugan being active and it was played for laughs.