A couple of pure lifegain cards were included in this list simply to help empower the Dawn
Pull from Tomorrow is a fantastic control card that embarrasses Transgress the Mind, unlike Glimmer of Genius
It can stand alone on its own and be a scalable mass removal, or a bank of energy to store for later in energy decks
Ancestral Vision and friends have empty/nonexistent mana costs, and these kinds of costs can't be paid
Its also interesting to note that many combos in EDH rely on casting and recurring creatures in an infinite loop, so one of these may very well be an important wincon for your deck
It doesn't copy whether that token is tapped or untapped, whether it as any counters on it or any Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, or so on