". . . begging for redesign" [OldnGrounded]
Seems a prudent conclusion - based on present state of actual information and reasonable inferences.
But there's another design redo flopping onto agendas, isn't there? The certification process itself. Maybe the lithium-ion batteries were a vague straw in the wind, albeit not stretching out an older type design as such. Clearly the MCAS situation - even if this accident doesn't turn out to be rooted in MCAS - is a strong indicator. As others have stated here and on Lion Air 610 thread, the process being set-up and administered so that mods can be added, to a basic type that is decades old, with this result, should not be allowed to persist. I won't even try to sketch a new and improved architecture for the FARs and the industry-regulator collaboration arrangement, even if I could, but isn't this work coming into necessity?
WillowRun 6-3