Ohh dear... this part made me laugh so hard. Yeah... gee wiz, to think that you would be allowed to use the abilities of your class to over challenges.
What is this madness?!
The way you say it, makes it sound almost like a revolutionary idea. The same goes with your notion of builds. It is perfectly common to use tailored specs and builds in an rpg. In fact, in most rpgs you have to because unless you prepare to each fight independently, you're not going to get through it, at least until you out gear it somehow. Hardcore raiding in WoW is a good example of this. So is soloing content in the same game, which is even more dependent on preparing for each encounter independently.
Believe I've already covered this part. I have no problems with the game being difficult and challenging. In fact, I like that Inferno progress is slow. I simply do not agree their design of how to implement some of those challenges. In this case, namely the way the NV buff works. Check my previous posts on the subject.