lol everyone has conflicting views.
the general consensus is that the actual text "The Tragedy of King Lear" by William Shakespeare should remain at the focus of your resonse. You can still mention the readings/productions, to show that they enhance your personal interpretation of King lear - but don't put them at the forefront of your response.
BOS basically wants you to show them that it has been the text composed by Shakepseare that provoked your personal interpretation.. not the readings, but your interpretation could've been enhanced by various readings.