Red cards are also penalized because its easier to play four colors, and red is the most common color to avoid
Keep in mind that these are the same cards as in Draft Boosters, though thats a bit balanced out by the lower number of Draft Boosters getting opened in the middle of the pandemic
Decks like Zombie Typal, that can field a ton of black tokens with ease with cards like Diregraf Colossus, fully removing opponents hands
Foundations helps to get around this by providing a slew of iconic, powerful, and very Magic feeling cards that should provide the backbone of the format
The XX mana cost of Omarthis, Ghostfire Initiate doesnt work with the cascade focused Zhulodok, Void Gorger, and its inclusion brought in other X mana cards as well, creating anti-synergy confusion in the deck