At the risk of repeating tucumseh above and of arguing semantics, IRCM is not DAS. DAS, by implication, refers to a "suite" of defensive aids to counter a wide range of threats be they IR, ballistic or radar guided. IRCM is designed to counter one particular threat. Perhaps. It is not a "suite".
MAWS and RWR are, as you quite rightly state, not much use on their own which is why they are installed in concert with a suitable dispensing system.
