Why might the size of the roman empire be a problem

Because it was so large, corruption ran rampant and politicians and senators often had their own interests at heart. The sheer size of the empire also made it hard to control, with many revolutions and uprisings popping up. The cultural diffusion was also an issue, as many different people and cultures were all under one banner, so infighting was pretty common, epically the further you get away from Italy.

The size of the Roman Empire would be a major problem due to the fact that they can take of and destroy any other empires that face them or get in their way to greatness. So the towering empire posses a threat to all of the surrounding empires and the roman empire plans on conquering all other empires.