In singleton formats that counts for quite a lot
There are still a lot of common abilities that are brand-new to me scry, flash, lifelink, this thing where I earn the citys blessing, legendary cards that have four different potential abilities but most of it gets helpfully defined simply by right-clicking on a card
But what are the mechanics you can expect
It doesnt copy whether that creature 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
It sounds very likely we'll see Rebound return to Standard, bringing with it a whole new wave of powerful two-for-ones and interactions
Archaeomancers Map is another piece that ensures you hit the land drops, but crucially unlike Gift of Estates, helps you to catch up too