If your opponent can disrupt your card retrieval strategy, it will be difficult to set up your board
I can see Skymarcher Aspirant as a playable one-drop for other white aggressive strategies, not just Vampires, placing it higher on the list than other members of the tribe
Yu-Gi-Oh , on the other hand, has decks that let players win on the very first turn of the game, not even giving their opponent a chance to play a single card
It may not be Tier 1, but I wouldnt be surprised to see Sapphire/Steel remain somewhat competitive
Bring your best cards back from the grave is a big deal and there are whole decks and strategies build upon it
WotC hit it out of the ball park in trying to capture the feel of the Final Fantasy Universe in a card game