This is a huge pet peeve of mine.
In real life, a legion could march from Köln (Colonia Agrippa) to Rome in 57 days. In RTW this would take several years! Highly cheesy and annoying.
One big reason for the Romans' dominance was their strategic mobility. Rome would never have survived with these frigging lazy slugs we get in the game.
Seeing as how you can give orders to a city in Ukraine, even though your capital is in Italy, in the space of one turn, why can't you march a legion there in the same time?
Can anything be done to make marching speeds realistic in-game?