In many situations, Disrupt Decorum is better than Insurrection in that you aren't the one deciding where all the creatures are going, and you don't get the kickback
As such the option to discard it was always interesting, it would allow for much more immediate and mana efficient card draw but it would significantly reduce the overall value
Each Play Booster contains 14 Magic: The Gathering cards, including 14 cards of rarity rare or higher, 36 uncommon cards, 69 common cards, and 1 land card
The Oracle also wins the game quickly when combined with a multitude of other options, and is rather hard to exploit thanks to its ability being an ETB one
However, there are more efficient mill cards such as Mind Funeral or Glimpse the Unthinkable that can mill more cards for a similar mana cost, making Traumatize less optimal for competitive play unless in a specific strategy