But how do you move fast enough to win claim with a mill deck? With the card pool I think Mill decks will lose more than they gain from this, as their aggro foes will trigger it first. Maybe when there's more room for fast-moving mill effects?

Right now, I'm more inclined to Jedi Temple, as you can build in a way that it hurts yourself less, and you can use it to get the hand empty once deck is gone, which is always an annoying speed bump.

I think this is a good multiplayer battlefield for a defensive deck. A deck like Qui-gon can happily sit in the corner of a 4 player game, build up shields for days and just rush for the battlefield whilst everyone else dukes it out with each other. Otherwise, I don't really see a good use for this in a 2 player game since it's pretty damaging whomever uses it (compared to a battlefield that does little to your deck when your opponent uses it)

Although I play a Mill deck I did not include this one. As Asklepios already mentioned above, due to the tempo of a mill deck, Command Center hurts more than it helps. I prefer Echo Base or Starship Graveyard way above this one for a mill deck.