Each drop contains a different legendary hero, all of which feel hand-made for leading Commander decks
May you open many Akroma's Wills just dont cast them vs me please
Many players coming from a Hearthstone or Magic Arena background are likely more used to making smaller purchases and are uncomfortable buying a deck for $300 all at once
The Garrison itself is pretty good, both for mana production and creating creatures if you dont have another use for mana on a given turn
As far as Magic Arena goes, there isn't really a way to get the deck cheaper than eight rares and four mythics since Dorothea, Vengeful Victim, Katilda, Dawnhart Martyr, and Hallowed Haunting are the foundations of the deck, although turning a rare dual land into Evolving Wilds does help with the cost a bit there as well
Some extreme combo cubes might have too few targets in some decks but this is a pretty pointless discussion as they will not be packing burn for burn decks either