It's splashable, and when it arrives to the battlefield, you have three ETB triggers you can abuse
Weirdly, despite the name, art, and flavor text, Consecrated Sphinx is not a Phyrexian - the Victor Adame Minguez art from the 2020 Secret Lair Drop and the Mark Zug art from Double Masters 2022 depict extremely non-Phyrexian Sphinxes, so it's clearly intentional, but it still feels closely aligned with the "double for me, nothing for you" ethos of Jin-Gitaxias, Progress Tyrant or Elesh Norn, Mother of Machines
This massively telegraphs what you are trying to do, just like a villain monologuing rather than getting on with the plan
Tolaria West has some cool utility getting most things from most places via Academy Ruins and Inventor's Fair however that is all mentally slow
Maybe, depends
But what Sword of Hearth and Home lacks in raw power, it makes up for by being an excellent card when built around