They are many confusion about different loss of control :
Stall and spin, deepstall, lazy eight, dutch roll, rupture of rudder, are all specific and very different.
Equations are very different. Litterature is not very adapted to describe these different behaviours of the plane.
I know some things about dutch roll, but less about deepstall. Perhaps could a test pilot explain some more about specificity of deepstall which has PERHAPS been the case in AF447.