It doesn't copy whether that token 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, or so on
Sure, it isnt literally a multicolor land that enters the battlefield tapped, but in terms of functionality, it allows its caster to continue developing, yet forces them to sink a single mana into the fixing its providing
If you're curious how your mechanic measures up against famous mechanics from the past, you can do the same calculations I just laid out
Note that a bonus sheet card only appears in one in every three packs, and uncommons appear far more than mythics
(It is possible, though, to get commons and uncommons in other slots.) Traditionally, in a Draft Booster, you get ten commons and three uncommons
A deck that focuses on controlling the board and disrupting opponent's creature strategies, such as red control or burn decks, would benefit from using Aether Flash to limit the effectiveness of creature-based strategies