While that may be true, Scoundrel is still a powerful card in its own right
At minimum you'll be paying 3 mana to save your commander, draw and discard a card which feels like a fair deal for its mana cost and I can see many Dimir graveyard, discard, reanimator or Izzet/Grixis wheel deck slot this card for its instant speed potential
Since it's a non-Human, you can mutate Animar, Soul Of Elements, and give the creature protection from white and black, two of the colors with the most removal spells
Its easy for newer players to look at this and view it as being the same as Rampant Growth, but this card doesnt specify basic land type
Steel cards are also aimed at the combative style of play, as these Glimmers have higher Strength and Willpower stats
Memory Guardian can easily become a 3/4 flier for one, which is great even by old Affinity standards