Well, this is just me. I don't particularly backed up my arguments with manga events. I invest on projection and potentials. My only argument here is that someone like Neji has the capability to take on 3t Sasuke against all odds. He might win, he might not. But he can stand a fight.
I don't underestimate the Sharingan. In fact, I acknowledge its superiority over the Byakugan in 1-on-1 battles. Maybe it is just the fanboy speaking, but I've always rooted for the Byakugan and have seen its amazing potential. Then again, lezz get real. It didn't received as much feats as the Sharingan did.