The importance of combat or non-combat things should depend on the campaign. I DO NOT want to see rules that say "combat should take 5 minutes, exploration should take 20 and social 30." That is the rules telling me how to run my game, and that's not what I'm looking for in well, any game.
Too bad that this is exactly what will happen.
It is impossible to design a game without some expectation of how it is played.
And as it is D&D the focus will be combat.