The designers had a new benchmark to work from and let loose a little more
Possessing the same transformation clause as the majority of its contemporary werewolves, it becomes the Krallenhorde Howler, reducing the costs of all creature spells by one mana, allowing its controller to easily cast the creatures they'd drawn before it had transformed
Hero of Bladehold isn't that great if perma-unsummoned
Use any of the typical untap effects available like Thornbite Staff and any sacrifice outlet, or just copy Zealous Conscripts over and over for an infinite number of token copies, ETB triggers, and untaps for Kiki-Jiki
The more laid-back nature of the format gives plenty of time for Treefolk to lay their roots and establish a strong presence on the board, leveraging their huge toughness totals to shrug off aggro assaults and win through unconventional means
And kill spells are going to get super expensive against it thanks to ward 3, which means youre presenting a very powerful commander to your table the moment it hits the field