Now I'll always wonder how they could of reversed the Snap

All you have to do is put the gauntlet on the other hand and snap to make the opposite effect. Everyone knows that.

Unless it's addressed in a future movie, we'll never know how else they COULD'VE done it.

Rather than scripting it as they did, where Thanos destroys the Infinity Stones, they could have told a story in which they confront him and wrest them from him, then use them to reverse his snap.