Complex sentence: In Racine and Corneille, the confidant became a more complex and partial character--though th abbé d'Aubignac complained that Corneille's use of the confidant was "without grace".
Split into simpler sentences: In Racine and Corneille, the confidant became a more complex and partial character. The abbé d'Aubignac, nonetheless, complained that Corneille's use of the confidant was "without grace".