Why have condonation and connivance been done away with in no-fault jurisdictions?

Connivance and condonation have been abolished as a defense in no-fault jurisdictions, because, as notes Black’s Law Dictionary "...agreements or acts of collusion are no longer necessary."

(Moreover, and perhaps more to the point, it is obvious that the three C’s invited people to end run the idea behind fault, particularly in the case of adultery; that is, the moral responsibility for the failure of a marriage.)