It's not Marchisio's fault that Elia and Krasic cant help Matri. The yellow card, is an issue, sub him for that ok, but there are many players out there today playing much worse than Marchisio.
Elia using only his right foot wont help us in this match in my opinion. Catania is defending tight so he cant make his move.
Krasic on the other hand, is indeed really bad today.
I agree Quag should enter.