Although that's true, remember that there's nothing particularly evil looking about Vader's TIE versus other TIEs. Heck, the features that made it so unique ended up getting mostly incorporated into the Bomber in the very next film. Vader's TIE looked more powerful than the other TIEs (although it didn't actually demonstrate that), which fits with Vader's character. He is powerful.

What is the distinctive essence of Palpatine? How can that be reflected in a ship while still keeping the aesthetics of the Empire? As much as I understand why bat-wings (well, that is what that looks like) make sense, they don't fit with everything else the Empire builds.

And there's nothing wrong with naked.