The engines we placed in a far from ideal position because of low ground clearance making the plane not fly close to neutral that is a fundamental design flaw
Normal flight is flight is fine. The issue with the new engines was that the nacelles generated lift in specific scenarios at high-angle-of-attack which changed the pitch.
This doesn't mean the aircraft is fundamentally unsound, it's just a flying characteristic and can be managed just fine if the pilots knew about it and what the MCAS system was doing to counter it.
