It doesnt copy whether that permanent is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on
Its too easy to remove, and only good in very niche situations
Shattering Spree Shattering Spree is my weapon of choice when it comes to dismantling mana rocks, equipment and other nasties
However, we now know that wasnt to be
Spell and trap removal is necessary in any deck, and the ability to set a card following this removal is another nice addition that can help speed up a trap card
(6/6/2025) If Gogo copies a legendary creature, Gogo will also be legendary, but because its name remains Gogo, Mysterious Mime, the "legend rule" won't cause either of them to be put into the graveyard