I think cued situational awareness does open to possibilities worth considering. With awareness and torpedoes, we do have a potential "dogs and guns" scenario in which 056 can make a lot of noise and chase an enemy into the less than tender embrace of a quieter hunter.
It also seems logical to ensure that if you carry a UACV on board, that it could be used in a ASW role, assuming of course that a suitable weapon exists in the PLAN arsenal?
But again I agree with your central premise which is that it is not necessary to have every ship carrying every possible form of sensor or weapon. It is the "Informationalisation" that counts and enables a lot more to done, far more effectively and for less.