every plane has it's character,.....most "scale" planes have stability and control issues. the closer you stay to true scale the more they show up,....usually in control surface inadequacies, which will translate into stability issues. that's why I say what I do....... learn to fly the plane as it is....a plane.... not as it is ...an electronically stabilized model. the electronic stabilization takes the character away and makes them all fly the same to some extent.
I guess I have no problem with these quirks being taken out by larger control surfaces and maybe different air foils and wing areas. i'd rather do that and know I am flying the plane, not a circuit board.