Gums
You are on to a big problem here.
If the Max is approved with a modified MCAS there is the possibility that someone enter a high AOA with flaps up and the MCAS works as intended.
Lets say on a climbing and turning departure, just for arguments sake!
The MCAS operates with full speed when flaps up, something a 737 pilot is only used to with flaps extended.
There is a remote chance a pilot could pull against it, and as that does not work, trim against MCAS.
As I understand it he is now entering a lighter stick with higher AOA and I can see this ending up with a stall and a spin in an extreme case.
Looking forward to my next sim, as I intend to test this if time permits.
Cheers