Well, I think Lucas had a clear vision for 'bringing balance to the Force' and I suspect it was realized when Vader turned back to the light and killed Palpatine. But it was also a clever trick, because on the surface it appears as though Vader literally brings balance to the Force by bringing the Jedi/Sith ratio to an even two against two.
TLJ seems to imply that bringing balance to the Force might require acknowledging that it 'belongs' to everyone and not just the Jedi.