Whether or not this accident is linked to MCAS, the 737 MAX has some basic conceptual problems. There are an artificial set of issues created mainly by Boing and SWA’s penny pinching. SWA have been determined for years that all 737s should be on a common type rating, leading Boeing to keep legacy architecture and system logic (if not the actual boxes under the hood) that would not meet modern certification requirements to save SWA training costs. The basic 737 airframe has been able to tolerate a lot of abuse, but a number of aerodynamic kludges have been introduced that violate the basic Boeing philosophy of pilot transparency and control.
Coupled with airlines thinking transition training is ok if it’s an hour watching a PowerPoint or two and only have 737-800 sims it’s easy to see where the problems come. For the record, my employer was no better with the A320 NEO - just an iBook and a short video!!!