One thing that Blizz has said is that they don't like "Double-Dipping", which is throwing a tabard on, earning rep rewards through doing dungeons, earning drops off of bosses through dungeons, and then buying JP/VP gear with JP/VP you got by doing dungeons.
Therefore, Dungeons = The Only Thing You Do.
Blizz WANTS us to do Dailies AND Dungeons. They want us to do multiple different things to gear up our characters. You can gear up by just dailies, easily. You can gear up by doing JUST dungeons.... if it weren't for LFR's lame looting system, that is.
Hence why I stress that LFR loot is one of the huge problems with this model. It is the thing that prevents people from gearing up solely from dungeons.
What Blizz WANTED was for the people who do dungeons AND dailies to reap extra rewards from their efforts in both aspects of endgame WoW. They wanted you to be able to gear up from solely dailies and solely dungeons to give people a choice.
However.... LFR loot kills this whole model. IF LFR geared you better, then their goal would be met.
Edited, Nov 13th 2012 4:34pm by Lyrailis