An awful lot of "what-ifs" here in contrast to "what-did" happen.
What's missing in the analytical discussions is the inherent ability of the crew coupled with the tolerance of the machine to result in a safe outcome.
Any talk about imbalances either due to the offset mass of the bird or even rubbery vortex shedding need balance against the inherent dampening in the wing and the ability of the crew to adjust airspeed eve a little bit.