I have the same question.
Playing with Volendam, currently on Netherland's first division, playing CL etc., and recently my B team started playing in Netherland's second division, which has 2,5 stars reputation. My facilities are 4,5 stars or better, all coaching areas with 4 or better, including the B team.
Are the games played for the B team enough for development as far as playing time goes?