Not really, IMO. Anything that can be done to obfuscate how much you pay and why you pay is ultimately bad for you. I sound like a broken record with that around here, but it's true.
Exactly. So, as you pay less for discounted clicks while not knowing why or how, you will increase your max bid. After doing so, those variables in the black box will be changed as needed. Maybe in your favor, maybe not, but you won't know until you find that you've overspent and need to scale back.
Google is already moving in the direction of more disclosure. Anything that gives you less information is bad for you, because you have more guesswork to do, along with everyone else in the auction process. These ad/click sellers have the capability to provide way more information than they currently do. Look up "winner's curse" and understand it. "We'll charge you less" isn't such a great thing when "you'll know less" is part of the equation.