Board Thread:Theories and Speculation/@comment-26825329-20150727070419/@comment-5271771-20170617132428

No doubt if Neji survived the war he would be the clan leader, no Hyuga has ever been so intelligent and talented, a true master of the byakugan and the gentle fist no one, not even Lord Hiashi himself.

Hiashi was surprised that a child of the branch clan was able to use the rotation and 8 trigrams 64 palms, having in mind that no one taught him that.

Even in a real fight at the genin age he would be trouble for Hiashi, at Jonin age Neji would overwhelm his uncle no doubt, his death was truly a crime against the universe.

As for his relationship with Himawari and Boruto I'm sure he'd adore them, he has lots of respect for Naruto as well as Hinata, even someone astern and strict as Hiashi has a soft spot for his grandchildren.