This paper deals with the criticisms that Iamblichus levels against his predecessors. His differences with his predecessors are not as great as he tries to make them. His criticisms consist largely of reformulations and more exact specifications. He takes his stand as a conservative, preserving the purity of Platonism against Porphyry or Amelius.
Dillon, John M., "Iamblichus' Criticism of his Immediate Predecessors" (1972). The Society for Ancient Greek Philosophy Newsletter. 26.