I don’t believe she will step down. This is her life long duty that she has taken on, she mentioned that being her promise back in 1947 in the statement again. It’s just about paving the way and preparing people’s minds.Couldn't she just be planning to step down willingly after the celebrations are over in favour of Charles? Why keep working once she's past this milestone
I also agree about Diana being granted ‘Saint’ status because she died young and in a shocking way. There is no way of knowing how it would have all played out if she was alive now.