Go-to-definition on case or default should jump to the containing switch statement if available.

[DanielRosenwasser]

/*END*/switch (null) {
  /*START*/case null: break;
}

/*END*/switch (null) {
  /*START*/default: break;
}

Those should work.

The following should not have issues.

export /*a*/default {}

export default { /*a*/case }
/*b*/default;
/*c*/case 42;