My read is canards will remain a Yang Wei-specific feature, or from the chief designer tree of Song (like the coach tree in pro sports). They are not a feature to compensate for something, like the small canard on Su-30MKIs, but an integral part of the overall aerodynamic and therefore engraved in the flight control software. By removing the canards they need to move the wings forward, and that is a complete redesign.
They wouldn’t need to move the wings forward if they inserted the canards where the LERXes were like with the Su-33/J-15, which is what I assumed the “rumour” was talking about before I realized I had misread (the rumour makes no mention of canards). I originally thought the source was talking about a triplane configuration, because it also mentioned tailplanes, and a triplane might’ve made sense if they wanted the fighter to be ski jump capable and needed some extra lift at low speeds.