Agree... Could Syagrius after defeating Franks force the Saxons to enter to an alliance with him and form a new (multinational) Western Empire? and attack Visigoths?
Europe would look way much different if it was flooded by Saxons and Romans instead of Franks... No Charlemagne, No unified Europe and Popes would still be under influence of Byzantine Emperor (or Lombards perhaps) instead of Franks...