It would make sense, the plan b. But what you said after would be good too. To have Modric and Mata in the middle would make our midfield very strong. Then having Perreira on the left would not be such a liability because Mata can help him, knowing Modric is still in the centre keeping the midfield strong. It would be ideal to hear we sign Modric & Perreira in the next 3 days but even if we get Perriera over Modric, it will still be beneficial to the squad. I personally think, Mata's quality is wasted on the left wing.