Louis XXIV
Le Roi Soleil
We don't need to get bogged down in Tank minutiae
I think the Civilopedia implies that the Panzer in the game is the Panther, fyi.
Anyway, I think the unit is good. It does what it should for a unit this late, it gives unquestioned superiority over its peers. It's downside is that, by that point, the game is often won or lost. By comparison to the Companion cavalry, which gives similar bonuses (less, but to both speed and strength) much, much earlier. It's use will always be limited by that. That being said, if you do need a late game push (either to win or to prevent another civ from getting a space race), it does the job well. I wonder if it has any "Blitz" ability like previous Civ games (attacking 5 times in a row would be quite cool).

Anyway, I think the unit is good. It does what it should for a unit this late, it gives unquestioned superiority over its peers. It's downside is that, by that point, the game is often won or lost. By comparison to the Companion cavalry, which gives similar bonuses (less, but to both speed and strength) much, much earlier. It's use will always be limited by that. That being said, if you do need a late game push (either to win or to prevent another civ from getting a space race), it does the job well. I wonder if it has any "Blitz" ability like previous Civ games (attacking 5 times in a row would be quite cool).