If the thing with Asmodia hadn't happened - say, if Pilar had invoked the curse's power herself to bring order to Project Lawful, or even just agreed with Asmodia to protect the Sevar loyalists - and Cayden Cailean had successfully managed the consequences of that as best He could, the best-case outcome from that would have been a few tens of thousands of Asmodeus-worshippers surviving who would otherwise have died, over the next year or so, thanks to work Asmodia would have done.
The worst-case outcome, if Pilar had intervened herself, would have been that it ruined Cayden Cailean's entire master plan! And left Asmodeus holding all of the benefits from all of the sacrifices that Cayden Cailean made! Cayden Cailean would have been left with nothing, and all Snack Service's work would have worked to greatly benefit only Lawful Evil and hardly Chaotic Good at all, and Asmodeus would have gloated.