Is Skeumorphic design that is the problem or bad design that just happens to be Skeumorphic?
You wouldn't want bad non-skeumorphic design either right?
Also curious do you want Finder on your iOS device?
Sure Finder was a great thing 20years ago but in many ways it's also the most anachronistic skeumorphic design idea possible.
To me bad design is bad design, and good design is good design. Skeumorhpic or otherwise. There are many instances in iOS of bad or dated very quickly design that really could be overhauled, but i wouldn't rule out a particular design track because it was over used by people who didn't know better.
How is finder skeumorphic? Because it has folder icons? Finders real life equivalent would be a file cabinet, of which it doesn't resemble at all.
I'm not trying to nit pick, you just sound like your thinking of another app. By the way, Finder in iOS would be welcomed by many!