This is underscored with the fact that 80%+ of the cards in the set altogether are reprints
The original Tarkir block had a cycle of three-color lands to match the sets five clans, such as Sandsteppe Citadel, Nomad Outpost, and Opulent Palace
I think theres something to be said for a deck where the commander really takes a back seat for most of the game, even beyond the cool lore parallel to Saurons role in the books
Just look at cards like Tatoyova, Benthic Druid, who is a five-mana Blue and Green 3/3 that lets you draw a card and gain one life whenever a land enters the battlefield
Consequently, it only makes sense that a massive tyrannosaurus rex card that lets you play all of your creatures at once would be a popular deck inclusion
Perhaps in some future version of the game Diablo will feel right at home next to a plethora of other, hyper-powerful and free-to-shift characters