The Wipperman chain has not improved my shifting performance. Period.

If anything I actually get a little more chain noise now (apart from my squeak) and I have noticed a few slightly more sluggish shifts. I swapped out cables as well so for now I am blaming the sluggishness on the cables until they finish "settling in".

If you already have the crank coming then I'd just hold off and see what happens once you've swapped it.