It might seem strange, that it was never before to the advantage of a 6th-circle Asmodean cleric to wonder truthfully what part of himself appeals to his Lord. But Asmodeus rarely promotes a cleric just for being Asmodeus-shaped. Maybe it happens on other planets, but not in Golarion, where He is constrained more by His intervention budget than by the power He is willing to expend.
Asmodean clerics do often obtain their 1st circle in that way, by being some tiny bit Asmodeus-shaped or at least pleasing in His sight. For them to obtain their 2nd circle that way is far rarer. Asmodeus promotes you not on the basis of His sympathy for you, but on the basis of you fighting in enough combat to make it cost less intervention; and then, His further expectation that you'll prove useful if promoted.
Trying to make yourself more Asmodeus-shaped would significantly help only two sorts of people: seminary students desperate to be Chosen at all, and 7th circles hoping to be designated by Asmodeus as Rugatonn's successor.