"…
that would do very steep climbs right after takeoff, still safe and within the envelope…"
As I recall, that was for a consistent close-in noise abatement procedure.
As pax in a manual manoeuvre - Orange County; pre takeoff special briefing by Capt, but even so surprising. Perhaps automation was to achieve consistency when close to acceptable performance margins; turbulence in that situation would make me nervous.
AFAIK the system was not developed, probably the operator saw little benefit for the cost.
The Embraer system is about takeoff performance over the fence:-
"
The Climb-Optimized Takeoff System is an aircraft functionality aimed at improving the takeoff performance. The improvement is obtained by allowing the airplane to rotate to an optimized pitch attitude at and after VR, … "
https://patents.google.com/patent/EP2533122A2/en
download pdf for description:
https://patentimages.storage.googlea...P2533122A2.pdf