Well, there we are. The FAA isn't concerned about the rudder stops;
only Cessna and the Canadian Government are. The fin attach is what the
FAA wants looked at, and it seems to be age-related as the rate of SDR
reports comes up. They also mention horizontal stab spar cracking,
which has been an issue in 172s for years and is (in the 172, at least)
often caused by folks pushing down on the stab to turn the airplane on
the ground.
I would anticipate many more issues arising as the fleet ages.
Our older 172s are beginning to show the odd crack here and there, and
Cessna sends out Service Bulletins that we take seriously and we often
find problems where they tell us to look. There are 172s here in Canada
with almost 20,000 hours on them, still flying, but they require
watching. I don't think Cessna ever intended them to last so long. I
wish new ones cost less.

Dan