True, the ground effect seems to be a bit inadequate.
One example is the Concorde which should (1) achieve smooth landing by just flaring 1 degree (!) and leave the rest for ground effect,
Based on my research into aircraft codes, IPACS has indeed implemented ground effects for the Concorde. During flight, I also found that an approach at an angle of 11 degrees can support a smooth landing for the Concorde. Perhaps your experience might be influenced by insufficient ground effect forces.
Compared to other products, Aerofly's aircraft handling can be overly sensitive. A friend told me this might result from insufficient aerodynamic feedback, causing minor details to be overlooked.
IPACS prioritizes releasing aircraft quickly while ensuring aerodynamic characteristics align with the basic parameters outlined in the FCOM (Flight Crew Operations Manual). However, they are not a team specialized in aircraft development. They can't create products as extremely realistic as PMDG and FINEX.
Writing aerodynamics is still an extremely tedious task. For my work on editing the B777, most of my efforts involve fine-tuning the aerodynamic codes, which consist of multiple lines of code. Even so, I'm just someone who has researched aerodynamic models and not a professional in this field. It's challenging to make every aspect satisfactory.
XPLANE and MSFS utilize Computational Fluid Dynamics (CFD) to simulate the entire aerodynamic model within the game. Yet, I think achieving this in Aerofly would be quite difficult.