It seems like you people are missing the point arguing about him using Kaguya. His stance was at their best the Byakugan was able to beat the Sharingan based on the fact that Kaguya who had both at their best is described as using a Hyuuga style attack as her best offense. Also seeing as the story is moving forward around the Byakugan and Tenseigan it's foolish to think it won't be the dominant eye going forward. Shit even back in part 1 when they mentioned the Uchiha they did so as a coorelation to the Hyuuga implying the Hyuuga lineage was more significant.