Buddy, now that you have target panic, it is unlikely to permanently go away by returning to snap shooting or shooting lighter weight bows. One of the frustrating mysteries of target panic is that almost any change you make seems like a miracle cure at first. Someone once said, “Put a dollar bill in the heel of your left shoe and it will cure target panic….for one shot.”
I teach and occasionally will get a student who can't stop his head from flinching when he releases the arrow. This usually starts with the student hitting his face with the string when he shoots. Correcting the problem that caused the student to hit his face with the string is the easy part. Even though the student knows he is no longer hitting his face with the string, he may still continue to flinch, because the flinch has taken on a life of its own apart from the string hitting his face. I believe that your (or my) target panic does the same thing. It may have been initially caused by learning to hold at full draw or being overbowed, but once we have it, we have to solve it as a separate issue apart from whatever the causes may have been.
Solving target panic permanently involves learning to control the bow, however you decide to shoot it. Snap shooters are not immune to target panic. If you find that target panic recurs after you return to snap shooting, I recommend that you take some program designed to put you back in control of the bow. Two of the best are Jim Casto's and Joel Turner's programs. They are entirely different programs, and I took both. I don't think you need to repeat Jim Casto's program after you take it once (thank God): he gives adequate instructions about what to do in the event of backsliding, but Joel Turner's program involves some fairly complex mental gymnastics, and it took me several repeats before I got it all down to where I could apply it effectively.