It's still 3 mana for a counter and sometimes that extra 1 is absolutely going to get you killed
The sheer destructive might of this deck is epitomized by its titanic finishers

Abhorrent Overlord Abyssal Harvester Acorn Harvest Aerith Rescue Mission Ajani, Adversary of Tyrants Ajani, Caller of the Pride Allied Reinforcements Angel of Invention Anim Pakal, Thousandth Moon Antiquities on the Loose Aplan Mortarium Arachnogenesis Army of the Damned Artifact Mutation Ashiok, Wicked Manipulator Assemble the Entmoot Assure // Assemble Assure // Assemble Aura Mutation Auton Soldier Banshee of the Dread Choir Basri Ket Battle Screech Baylen, the Haymaker Beck // Call Beck // Call Beetleback Chief Belfry Spirit Benevolent Offering Benthicore Birthing Hulk Blade of Selves Blaze Commando Blight Herder Boggart Mischief Borough Backup Bramble Elemental Bristlebud Farmer Brood Birthing Brood Monitor Broodbirth Viper Broodhatch Nantuko Broodspinner Call the Scions Caller of the Pack Captain of the Watch Captain's Call Carrion Carrion Call Case of the Pilfered Proof Cenn's Enlistment Chancellor of the Forge Chandra, Acolyte of Flame Chandra, Flamecaller Chasm Skulker Chronozoa Cloakwood Hermit Cloakwood Swarmkeeper Cloudgoat Ranger Cobra Trap Conqueror's Pledge Corpsehatch Cosmogrand Zenith Crush of Wurms Cubwarden Cultivator of Blades Cyclopean Tomb Dance with Devils Daretti, Ingenious Iconoclast Darien, King of Kjeldor Day of the Dragons Death Mutation

But I think perhaps my excitement that day was a close second
I may be on board with spending extra for a box thats prettier that you like it as long as its equally as protective, but Id never recommend spending less for the same reason
The Thief lets you draw then discard a card when one of your creatures deals damage to an opponent or you draw three with a full party