Not unusual for an AD and anyone with the subscription service to the 175 documentation has access. Similar to AW and others.
Normal chain of progression for a new aircraft.
I note that some service life limits (SLL) have been increased, I suppose that can be turned into a negative thing if we try hard enough. How about they didn't do the testing properly in the first place and underestimated the life thereby demonstrating what an appalling shower of cads and bounders they are.