It's surprisingly difficult (and expensive) to manufacture perfectly sized, perfectly cut trading cards to that exact specification, so even the best designed fakes can often slip up on the dimensions, making this an essential check
Using cards like Muscle Band, Lucky Helmet, or Float Stone, the player can initiate extra draws
Cleanse is another 'banned for sensitivity' reasons, which I feel is just an unfortunate side-effect of its anti-colour wording instead of actually being offensive like the Invoke Prejudice or Gypsy cards above
The combination lacks lifegain and efficient ways to deal with enchantments
And no, its not just because of the Fae Dominion precon from Wilds of Eldraine Commander
My guess here is that the team liked the black mode but needed the card draw in blue more