This sounds like missing features or poor 3D models/texturing and not just bugs. And the fact that it will likely take months to fix backs that up.
I’m a software developer, I have deadlines, I meet those deadlines unless the client makes functionality/design changes (very common). But in this case, the client, MSFS/Asobo, would not be making last minute changes, the design and functionality should have been frozen. AH should be able to deliver on time. Bug fixes come after.