You explained very well and convinced me, your suggestion is probably the best way to play against Bilbao on Sunday. Your formation is probably less risky than using a tired Dani Alves and the average Mathieu/Adriano as full backs in 4-3-3 formation.
You were saying that we would win 5-0 on monday iirc.So,i call this realistic,not pessimistic...Too much pessimism.3 points is what we will get.You will see.
What a difference a couple months can make in football. In June, we were the toast of Europe having conquered all. Fast-forward to August and there's unease about the first game of the season @ Bilbao.