The “already and not yet” is still a valid and wise statement about God’s kingdom, which unfolds in three stages. This post also answers why healings do not happen 100% of the time right now.
But he was not a king in the mold of Caesar. He was called first to conquer invisible, spiritual dark forces, and your heart by love. In the near future, the worldly kingdoms are going down in defeat, visible for all to see.