WS-10 engines on J-11 have been disatarous resulting in many crashes............all those people who want to go for J-10, Let me tell you single engine planes have never been good naval strike fighters.
J-11 would need lots modifications in Radars, EWS, IRST, engines to become a decent Naval strike fighter................J-15 would be far better option if its really comparable to Su-33 upto certain extent.
A-7, A-4, Etendard all are single engined jet having an excellent service record.