The Roman Empire in the east at the time did just fine, though. The Goths in a (very technical) way "unified" the empire after they took Italy since they got r

The Roman Empire in the east at the time did just fine, though. The Goths in a (very technical) way "unified" the empire after they took Italy since they got rid of the western emperor and declared that they are now vassals of the one in Constantinople. In a couple of generations Romans were on the verge of retaking the entire Mediterranean, without the issues with the climate and especially the plague they might have done just fine and we'd be talking about the "crisis of the 5th century" instead of the fall.