It is not exactly clear why you guys need to introduce notions of "flare maneuver" or other "headwind component change" when the equation is simple.
As alpha max is maintained in level flight at Valphamax :
- Any increase of thrust will produce a climb as alpha max is maintained at Valphamax
- Any decrease of thrust will produce a descent as alpha max is maintained at Valphamax
- Thrust controls the V/S
- Thrust does not control the speed which stays at Valphamax