Hi,
The 'almost an AF447' thread shows what I see as a problem with the procedures, if not with the profiles the jets are flying. To wit, a fascination with overspeed. The reaction to pull up. But then, we see "what the hell are we doing climbing so far?".
Not deep technical (no drawing or PDF) but I think that the procedure in case of overspeed is the high speed protection come in force:
The AP will disconnect .. high speed protection come active ... as an interdiction to go down and a command to go up and return to normal flight command when end of overspeed
Note that the ATHR still active and will go to TOGA (and so add a little more up movement)
The AOA will increase .. and if too much ... the AOA protection will be activated .. this will give some down command to keep alpha prot and the altitude will decrease
The aircraft will find a balance and will remain in that position and altitude reached if pilot(s) do not touch anything IMHO
DW know certainly better