If ID is so non-specific that it's predictions are indistinguishable from those of the Theory of Evolution, why do you believe it necessary to ADD ambiguity to the equation in the form of that nebulous, undefined "Designer" character intrinsic to ID?
But of course, that question only applies if your conclusion is correct. In actuality, there are whole classes of observations--mammalian fossils predating trilobytes, or specific combinations of traits on a single animal--that the Theory of Evolution specifically states should never be. It is this predictive power that gives the ToE a leg up on ID. What would ID have to say on the discovery (living, dead, or fossilized) of a feathered salamander?