Ever flew on a jet that needs more rudder input during a crosswind landing then in an engine failure at V1 at TOGA ?
No thought not....
I completely understand the theory, the practicality is a bit far fetched imho.
Maybe check this link out again:
http://www.avioconsult.com/downloads...%20failure.pdf
Seems that VMCA does change, at least on a 707/dc8. Banking into the dead engine makes it all quite exciting.
Your graph is interesting, but unfortunately its not based on actual data. You could put the blue line higher by reducing the size of the fin, to a maximum of 1.2 x Vs. Thus saving weight and fuel.