Well it's 7months since this thread was started and we still do not know how the OP got on, maybe he got rid of his MY07 it would have been good if he managed to find out the problem and let us know?
Maybe the Haldex pump, filter, or the plates sticking.
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Maybe the pump.
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this one does not look to bad, but is it working i will know later today.
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A bit of sludge in the bottom.
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Maybe the clutch plates again these were in excellent condition
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I will strip the last one out of three either today or tomorrow, the OP may respond by then.