Working Title would be the only team that could enhance it. Asobo reached their limits shortly after the August '20 launch, that’s why Jorg brought Matt and the crew on to fix it all. Strategically I think MS-Asobo made a decision on an ROI - i.e., the G3X is “good enough.” Obviously parts of us in the user community disagree with that. 
That’s what leads me to believe that at some point, the King Air 350i has to be an Aircraft & Avionics Update recipient. There’s just no way they’re going to let the KA linger in the unrealistic configuration it’s in. But that does mean Asobo will have to unlock or redo the interior cockpit model. It’s just improperly configured today to even take an STC G3000, never mind the ProLine 21 that it should be.