Healing from a cult and ridding yourself from its indoctrination are two very different things. The latter is a lot easier to do.
Healing is relative. Some pre-damaged people are drawn to cults, so when they leave they still have their original issues to deal with. It would be easy for these individuals to project their original issues and claim they have problems as a result of being in a cult.
If your circumstances are right, with effort and a bit of luck, you can pretty much move on successfully and have a full and normal life, if that is the definition of being 'healed'.
Some 'hang-ups' from being in a cult can be very useful. Ex JWs tend to be very sharp when it comes to critical thinking. They also tend to have a very good ability to debate logically and rationally.
So I would say yes, it is possible to completely move on from being a JW.