Complex sentence: Achaeus of Eretria belongs to the classic age, but was not himself a classic, though his satyric plays were much admired for their spirited style, albeit somewhat labored and lacking in clearness.
Split into simpler sentences: Achaeus of Eretria belongs to the classic age, but is not recognized as a classic writer. His satyric plays were much admired for their spirited style, albeit somewhat labored and lacking in clearness.