Question: Would a high rate of descent make sense if the Cptn put the A320 in a steep dive from considerable height -- NOT with any bad intentions, but in a desperate effort to recover from a stall?
Perhaps powered, or initially unpowered but restarting engine(s) along the way?
I don't know what to make of subjective words like "high rate of descent" etc. without verified data.
But if you want to restart engines you should be thinking of controlling your speed within restart limits, while at the same time extending your glide to give yourself enough time to benefit from a restart attempt. If they really are screwed up, they will be very sluggish in spooling back up at altitude and easily fool you into thinking they have flamed out (ala the China Air dive bomber on the way to SFO)
Then again the structure of the aircraft doesn't like vertical overspeeds as well. Make of it what you will but I doubt the pilots would command something of great extent