Also, you could kind of explain it away that perhaps these clones are a byproduct of both science and Sith alchemy. Perhaps they have to infuse these clones with the dark side in order for them to be even viable for his spirit.
That is actually how I explained it in my novelization. Great minds think alike!
Oh really? Thanks for the compliment! At first I actually agreed with the idea of making the clones look more normal, but that explanation works for me. I guess you have to question why Palpatine’s current vessel doesn’t look as wrinkly, and more like a pale McDiarmid, but it’s all a little convoluted anyway, so you can hand-wave it somehow.