Er, what? The Uber pricing is listed right there in the app, in the same way that taxi pricing is listed: base fare, per-mile fare, and per-minute fare. And if surge pricing is in effect, there's even an extra tap-through step that tells you what the multiplier and final costs are, and asks you to confirm that it's ok.

There's even a trip cost estimator in the app that you can use by telling it your destination.

When the trip is over, you get an email receipt with the total time and distance with the charges listed, as well as a map with the route drawn.

I'm not sure how you can get more transparent than that. What else are you looking for?