Because you get to scry 2 before the draw effect occurs, you get to be highly selective as to what you draw next
Options include: First Response, Angelic Accord, Martial Coup, Sacred Mesa, Mobilization, Captain of the Watch, Evangel of Heliod, Hero of Bladehold, Elspeth Tirel, Elspeth, Sun's Champion, Decree of Justice, Increasing Devotion Winning So we've ramped up, drew a ton of cards, made a bunch of tokens, and blew up our opponent's stuff
It looks like a set for everybody
Throw in Kinnans ability to play creatures at instant speed, with the added benefit that players get to choose what creature it is, and its clear why Sisay, Weatherlight Captain is a force to be reckoned with
That said, the Test Chansey card does have a retreat cost () so Im not sure if they decided against it at first only to add it back in later