It depends massively on our activity in the transfer market this summer. If we can get the right quality players in, I've absolutely no doubt he'll play those players more often than not if they're performing, as he is now doing with Torres, and as with Mascherano. We don't have complete players in the wide areas, have only one up top, and at left back we're lacking also. As such, these positions get rotated more often. Incomplete players aren't as a adaptable, and are more inconsistent as a consequence. The players I'm thinking of are; Pennant, Benayoun, Crouch, Kuyt, Voronin (incomplete in every way), Kewell, Babel, Riise and Aurelio. If we had a more complete natural left winger, example - Vicente, David Silva, a solid left back with ability - hopefully Insua, and either i) A second forward or ii) A top quality right winger, then I think you'd see that 2-3 player rotational average come to fruition (it's not miles off at the moment ffs). I don't think you'd see many strange formations if we had the right quality, it's the players I mentioned above that lead to indecision, inconsistency and an inability to finish teams off IMO.
All the factors mentioned by Bob re focus and concentrtion are equally as important, we've been uncharacteristically lacking in focus from set pieces at times, and that in particular has cost us.