Those reserve teams are a real problem to the most german clubs having to play against them. They don't bring fans (less incomings and atmosphere), their line up is way too often unpredictable, which leads to competitive distortion, when one game is played with their original squad, but another with convalescent Bundesliga players. I remember a match of Eintracht Braunschweig visiting Werder Bremen II mounting up with a number of six Bundesliga Players - two of them having played for national squads before. Werder won 4-2. One week later Werder II had to face VfB Luebeck away, and without any Bundesliga players they lost 0-3. Braunschweig and Luebeck were rivals for promotion to 2. Bundesliga... Those issues are no exception. It happens almost every match day.