Just one point about exceeding the AoA and getting a wing drop.
Near the stall, lift hardly depends at all on angle of attack, so the ailerons have very little impact on wingtip lift. In particular the stalled wingtip continues to produce very significant lift, but has become unstable in the sense that any further increase in angle of attack reduces lift, which usually increases angle of attack because of increasing roll.
In the turbulent conditions of a stall, almost anything could get this started.
As an aside, this instability approach explains why stalling the whole wing while landing is so much gentler than stalling at height - the wheels stop any rapid descent and so the just-stalled wing still produces lots of lift.