Do people really believe that some supposedly perfect build (a la hammerdin) won't be discovered and overused in D3 just because there's a large number of raw combinations possible? People gravitate towards min/maxing any way they can.
No, not really. But the "only six skills? SHIT SUX" people were starting to get extremely annoying so it's good to have math on your side. However I'd like to think that most (if not all) skills are viable now since there are no more prerequisite skills you need to grab to get to the good stuff and that you can craft a build at least somewhat to your liking.