The main issue I have with the deck is that any half-decent Commander player will see what this deck is trying to achieve from miles away and just reserve removal, board wipes, and graveyard exiles to repeatedly hammer down on its controller until they're left with few strategic options
Why does MTG card size matter
Only two of these Islands are not promos
Since its colorless, it can go into a wide variety of decks and likely will
Not every Blue deck is going to be about casting Instants and Sorceries, but the ones that are will want this to hand
While both cards allow the player to draw seven cards, Timetwister puts your graveyard right back into your library, allowing you re-draw already cast powerhouses such as Time Walk, Black Lotus, and others