For three mana, you essentially get to draw two cards during your draw step as opposed to just one
It supports 25+ TCGs including Pokemon, Magic, Yu-Gi-Oh!, One Piece, and Digimon
It goes through the entire main process, which creates the whole impression of the play
"Super Quantal Fairy Alphan" helps to ease a potential disadvantage with the archetype's Main Deck monsters all being comprised of different Levels, as its first effect allows the controller to target a "Super Quant" monster they control and have the Levels of all other "Super Quant" monsters on their field change to match that of the target, allowing for a convenient way to conventionally Xyz Summon with two Xyz Materials, should the controller not wish to use, or be unable to use, the effect of "Magnacarrier" to Xyz Summon with a single Xyz Material
Vandalblast, sure
If you look at it simply, both the RBI and the effect have deteriorated