Why ??? The D is still in development and as such I think we all should calm down and first of all wait for confirmation even if I agree, that this time it seems much more reliable than all previous reports.
As such all our personnel feelings - be that "Russian-fan-boy like: hey You get out best fighter, so Your J-11s must be worse !! - or PLAAF-na-boy like: they are stupid, the PLAAF has the J-11D, so all is wrong - should be out aside.
If the PLAAF will get the Su-35, so take it what it is: A win_win-situatioin for both !!
The PLAAF will get a new fighter, that brings new capabilities, an inseight into the nearyl latest Russian avionics and propulsion systems, the opportunity to explore TVC for the first time ans as such to develop tactics to use or avoid them ... and maybe also access to the 117S engine to power the the J-20. Weren't there reports abaout a mayor engine -surprise on '2017' ???
And Russia receives finally an export customer for its Su-35, much public attention and by the way .. that all for only 2 billion $ !