At the same time, the Hero deck required fewer lands, which meant that the Rat deck was more likely to get mana flooded (by virtue of needing to build with more lands in the deck)
Eight mana seems like a lot, but its a bargain for the power this Patron can provide.
So, yes, I still might run Heroic Intervention in green, or Teferis Protection in white, but if Im playing blue, Ill take less of that effect and have counterspells act as a multi-tool, which frees up deck slots
Its helpful that this deck is a bit slower out of the gate because you can then discuss with the table what would be good cards for you to remove once you get your commander out
Its a great tech for an attacker that needs energies in hand to deal a ton of damage