We have been trying different combination of players but I don't remember we have ever played Busquets in Xavi's role in the middle with Mascherano/Song playing Busi's role against more physical teams who want to kill our possession based passing like for instance Bayern did in the semis. With Busi playing in a little more forward role and Mascherano/Song playing Busi's usual position it would be a different combination one which can throw off the oppostion off guard. Busquets with his usual knack of anticipating and cutting off attacks much more forward it d woulgive us some more cover. On the other hand going forward his single touch passes as well as his vertical splitting passes going forward may enable us to benefit when we launch a counter attack. Its just an idea that I am floating for discussion. I look forward to views and discussion on pros and cons of such a move.