lcloo
Captain
I think there is still a place for dedicated strike aircraft. The Su-34 is a good example.
If the J-11CS turns out to be like the Su-34 with much larger airframe and side-by-side seating, it would be a terrific asset for the PLAAF. With a combat radius of 4500 km packing two CJ-10K (each with 1500+ km range), a strike aircraft like this would be perfect for PLAAF.
PLAAF is in urgent need of long range strike platforms. So far it seems it has only the H-6K (not yet mass produced) and a future trans-atmospheric bomber. Something like the Su-34 would be complementary.
The land based PLAAF and PLAN air wing can have dedicated strike aircrafts, but on aircraft carrier there is limited space, having separate strike group and fighter group means there is lesser number of aircraft available for strike or air interception.
A multi-role aircraft mean your number of strike and interception aircraft is double, and your repair maintenance, spare parts, logistic, pilot and support personnel training is easier.