The Jets signed Donald Strickland last offseason to provide insurance in case Kyle Wilson was not ready for the nickel role. This proved unnecessary as Wilson locked down the nickel effectively. Strickland's role was a small one as the fourth corner who played in subpackages. He covered tight ends a lot and was pretty solid in that role. Strickland probably lacks the size or speed to start effectively, but it would be tough to find a better guy who is fourth on the depth chart.
I can see the wisdom in bringing the free agent back. At the same time, this might be a better role to develop a young player. Strickland will be 33 in November. The reps he will get could go to somebody with a higher ceiling. Again, Donald was insurance for Wilson. That insurance was not needed.
I would probably be inclined to see the Jets let him walk, but I will not have a huge problem if he returns. How about you?