Vilas
Great man, try it yourself with
47 tonnes
FL350
OP DES with speed increase
Thrust Idle
The aircraft will pitch down violently to chase speed, no matter what you call it or how many arrows and Toulouse-style protections you refer to. Initially quite smoothly but once established in descend it will offer you at least -3500 fpm if you squeeze the speed up. Just like a Boeing, just like the MD did.
Looking forward to your results