Time will tell.
Signing Jackson always seemed a bit odd to me. Small sample size in the majors and not much success. Maybe he can catch lightening in a bottle, but more than likely, considering his age, I think we're in the realm of what you see is what you get. Low leverage arm when you're up big or down big.
Wouldn't mind Winder or Henriquez getting another look. Even if they have low ceilings, it's still higher than Jackson's.