You have to change who Cicero is for this to work. That said, I'm not exactly sure. We'd certainly have a lot less literature on the period. He has such a major impact on everything from how the Catilinarian conspiracy was handled, which leads to the politics in the couple years following and then in the late-mid 50s with Clodius' standoff with the rest of the senate, which was largely shaped by Cicero's exile and recall. Then you have to account for different outcomes potentially in some key trials, in perhaps a different path for the triumvirate, and I won't even get into the butterflies surrounding post-Caesar assassination since everything would be altered enough by then to butterfly the scenario occurring anywhere near as OTL.