[2] Among his achievements as director, he greatly expanded the repertoire of the theater, both with domestic and foreign works.

On the domestic front, he introduced the works of theretofore unknown writers, such as Ivo Vojnović, Ante Tresić Pavičić, and Milutin Cihlar Nehajev [hr], as well as revivals of Croatian classics such as Ivan Gundulić's Dubravka and Junije Palmotić's Pavlimir.

[2] Other foreign writers Miletić brought to the stage include Molière, Euripides, Johann Wolfgang von Goethe, Kālidāsa, Henrik Ibsen, and Pedro Calderón de la Barca.

[2] Miletić was noteworthy as the first director of the HNK who was not an actor by trade and did not sign his directions, as was common at the time.

[2] Given his upbringing in a noble family, he was able to spend lavishly on the theater and was not dependent on state subsidies.