Complex sentence: Regardless of the long-term outcome of the "Lex Servilia", Crassus' speech was still celebrated and became a literal model of Roman eloquence: it was studied, for instance, in a textbook by the young Cicero a few years later.
Split into simpler sentences: Regardless of the long-term outcome of the "Lex Servilia", Crassus' speech was highly celebrated. It became a literal model of Roman eloquence, and was being studied in a textbook by the young Cicero a few years later.