One of the biggest issues to me was the redatumization of MCAS upon reset. This would allow the inputs to sum and account for the screwjack going to full travel.
I've raised this issue on R&N with no real response. It seems so important.
Another mystery is the clear statement way back of MCAS reestablishing the old setting after actioning. I just don't know how to search that in the vast number of posts.
Reading everything FcEng84 has written is good advise.