After testing out the Nephalem Valor system for the last 6 months, I have become pretty disappointed with it. When I first heard about the system, I was really excited. I immediately thought "GREAT! Now we don't have to farm one spot all the time, and there will be motivation to move all over the world!". For a while, I really enjoyed the system.
Now, I am realizing that it feels really dumb. It doesn't feel fun to go out and hunt down Elite packs, just to get 5 stacks of this buff, before you start MFing. I always liked to turn to Diablo when I had 20 minutes before I had to leave the house for work or class, I could get in a couple Mephisto runs and maybe get some quick loot to be excited for when I got home. That is no longer possible, seeing that it will often take 20 minutes just to get your 5 stacks up. Now, a magic find run that could be 5 minutes has turned into 45 minutes. Diablo used to be the contrast to WOW for me, because it was casual, and had immediate gratification, wheras you'd have to dump lots of time to accomplish something in WOW. Now that's how it feels in Diablo 3.
This post isn't meant to be a Diablo to WOW comparision, or a casuals vs. hardcore players type of thing. What it comes down to for me is that doing magic find runs for loot (what this whole game is about) feels like it's too arduous and grindy of a process. I propose you remove Nephalem Valor, and just let us farm where we want and when we want. Up the quality of boss loot, and don't make us travel all over the world to do a MF run.
I get that you have your vision and your ideal view of how Diablo should be played, but it doesn't make it feel more "diverse" when you force people to farm buffs. It doesn't actually increase the number of viable farm locations, because people will still find a few key spots with a chain of elites to farm. The Diablo playerbase is a strong one with a strong history. I think that it's a bad practice to take away things from people when they've been so accustomed to them for so long.
TLDR: Nephalem Valor isn't fun; remove it and let us farm where we want without farming buffs. I don't want to play in more areas, and I don't want to play longer. I want to play where I want for how long I want.