My understanding is that the MCAS affects the aircraft's attitude when sensors indicate that the attitude is making the aircraft unsafe. (The problem is that the sensors have been wrong, and instead of correcting a problem [that in fact didn't exist] it created a different, and catastrophic one.) The problem identified in this South West aeroplane was about engine function, and that is unrelated to the MCAS. From that perspective, your comment that there was nothing to see here was in fact accurate. It was unrelated to the factors that resulted in the 737 MAX fleet being grounded. Whether it turns out to be a systemic fault or just a one off incident remains to be seen.