One question is whether we try Mitrita in the CAM spot in the event that Maxi can't go.I think this is a very valid point and what you pose is definitely an option to try. Who knows if Heber is fully fit enough to start on Saturday, so perhaps that would be a good option to try this (and then bring Heber on in the 60' and move Mitrita back to LW).
Or perhaps he hasn't been passing as much due to the lack of a true CF there for him to link up with. Perhaps Heber will help remediate that, but I agree with you that we don't know for certain and there is some room for concern there.