Pain Lands Pain lands were the second-best type of dual land design until the Shock Lands were introduced in Ravnica block
Instead, there are borderless versions of both Mishra, Tamer of Mak Fawa and Urza, Prince of Kroog
Monocolored commanders are a thing Lorthos, the Tidemaker and Omnath, Locus of Mana are two of my favorite decks but a quick look at this list of top commanders says it all: no monocolored creatures anywhere
So it might stop a lot of people that love Magic the Gathering from playing Magic the Gathering arena at first, but the game really could open the competitive side for a new player that was only familiar to Hearthstone or Gwent right now
This also helps with Tyranitar
Nintendo is obviously making a mint in any event, but the company often likes to keep tighter control of their properties.