In my humble opinion much too much is made out of the MCAS issue. All the fleet transition and training documents available from the manufacturer have included it. Anyhow, as Boeing have mentioned themselves, a malfunction with it is already covered by present procedures. It's operation is transparent to the crew, so in case of false MCAS activation due to unreliable AOA data we basically have a runaway stabilizer - and flipping the cutout switches mitigates the problem.