You mean 52-49, right? Pompey dies in early 48 and the rest of the war is a mop-up operation against Cato and Scipio in Africa that was never seriously in doubt.
Aye, the whole Africa campaign was sort of a done deal. But what about Spain? Caesar was ridiculously close to being defeated and killed at Munda by the Pompey brothers, and had he died there he would have gone down with most of his senior staff + Octavian. You then have Antonius and Lepidus in Rome against a victorious Pompeian army in Spain, which is by no means a one-sided affair.