Stoneforge Mystic no longer finds Colossus Hammer (or anything else), Archon of Cruelty is just a big flier and no longer wins the game for Creativity decks, Primeval Titan cant tutor up lands and gets blocked by Elesh Norn, Mother of Machines for days, Omnaths landfall ability doesnt trigger - the list of popular decks and cards that Elesh Norn stops is surprisingly long
Relying on having dorks in play makes it narrower, less good early and more situational
Pricing is currently unavailable and likely wont be consistent until the set has been in players hands for a month or so
Theres also the constant concern that Varchild, Betrayer of Kjeldors controller might sacrifice this red commander and take all those Survivors, adding a bit of fun tension to the game
Its very easy to trigger, in other words, which makes Caretakers Talent a white Phyrexian Arena at a baseline