Lomcevak,
I don't think stick forces will be an issue for a desktop simulation, given that users will have a generic joystick without stick force, although feedback versions are available. Depending on the intended market, I would doubt the fine detail of Tornado handling will be worthwhile, maybe even a distraction.
That said, I think your idea about stick displacements is a good one. Without that sort of detail all flight sims would end up pretty much identical (in terms of handling).
EAP,
Good point about seeking out academic papers.