You are correct Peter H, zero evidence has been released that the MCAS did not function as anticipated. The code was not the problem, the specification itself was the fundamentally flawed for commercial reasons. The name you want to search (this site & google) is Rick Ludkte. By having only a single sensor MCAS, no warning to the pilots was required, no warning means no simulator training, only a one hour iPad course. The risk was further assessed by Boeing as being one below catastrophic, and therefore did not require a crew warning.
Penalties of $1 million per aircraft were agreed by Boeing if simulator training was required for some large orders.