In a perfect world, all ARFS would be absolutely perfect and free from warps.
They also would not be prone to being tailheavy and too high in wing loading.
Many EDGE models in smaller sizes suffer these problems.
I have built and flown two of the better ones -- the D Patrick and the H9.
in both cases - it is extremely easy to make them tail heavy .
When tail heavy, these models pitch extremely easily and snap rolls are easily induced.
ANY control input (deliberate or accidental)which causes even the slightest yaw during the elevator input, will make this situation even more pronounced.
An Edge - built straight and light and with no "funny" trim problems -is a good plane.
Aerobatic models when setup correctly are extremely easy to fly.