The J-11 is descended from the original Su-27 "Flanker." More of an air to air fighter. The J-15 is a carrier version like the Su-33. The J-16 is a strike optimized version like the Su-30 or F-15E. Thus, greater emphasis on SEAD/DEAD and EW.
Yes, production wise, it looks like they're focused more on the J-16 out of these three platforms. In fact, the J-11 is a little dated by now and getting less attention/upgrades than newer models like J-10C, J-16 and J-20. Looks like the PLAAF is planning to replace the J-11's air to air capabilities with a high-low mix of J-20 and J-10C. Meanwhile, the J-16 will provided much improved strike capability.