I was in the library today so I took a look at their copy of the
Barrington Atlas in the hope that it might contain a better name for the continent currently named Achaia, since that was really a province name. No luck though. Greece is the closest you could possibly get from it for this time period. It's annoying because surely they must have called the general area something?
Anyway, the atlas also has a map of the Roman Empire at the end of Trajan's reign in 117 so I had a look at that too. It includes 43 provinces for this date, 33 of which you have used. Of the other 10, once you have taken into account the areas you have had to condense, split or add for playability reasons, the only major disagreements it has are Africa (but the name change to Carthage is needed for the map), Arabia (which is apparently where Judea is, and Judea was just a small province on the coast within it), and Illyricum (which doesn't appear anywhere on the map, and the province seems to have been called Dalmatia).