I'm not sure quite what this means to you or what you think it should mean to me. Could you express this more expansively? Do you feel that there are equal parts of RPing and combat/wargaming in 4E or do you mean that you think the amount of RPing and combat/wargaming are in a proper balance for how you feel an RP game should be or somehting else, perhaps?
What I mean is that I feel they did a good job with each. Obviously, this is just my POV, but I believe that combat should have a solid and well-designed ruleset in order to be fun.
Too few rules (free form) and combat is too arbitrary (for example: you describe what actions your characters will take, and then the DM rolls a single die, modified by how effective the DM deems your strategy, to determine whether you win or lose the fight).
Too many (poorly designed) rules and it can become a snooze-fest. (Okay, you hit, roll on table 3; now subsection C; now plug that into your 1099 form; and find the square root of the result... Okay, let's see now...).
I'm of the opinion that the 4E designers created a solid combat system that is a lot of fun to play, and so far my players agree that it's the best combat system we've ever played.
In my opinion, out-of-combat actions are rather different. They need a solid rule set to underlay them while remaining free-form enough to handle anything that a player can come up with (preferably without leaving too much of the work for the DM to "make something up on the fly").
I think they also did an excellent job with out-of-combat situations. Common actions (skills) are quantified adequately (so the DM doesn't have to make something up if a player wants to hide behind a bush) while also providing guidelines for adjudicating actions that aren't covered by skills. I haven't had any troubles running RP-heavy adventures (mysteries, for example).
Obviously, at some point the players are likely to want to test their shiny attack powers, but that does not preclude a balanced game (equal parts combat and out-of-combat time). A WoD vamp with high levels of Celerity and Potence (super-strength and speed) is at some point guaranteed to want to break some faces regardless of how "RP-heavy" the game is.
My point is that good combat does not preclude good roleplay, and in my opinion 4E does both well*.
*Rather, 4E has a well designed system for out-of-combat actions, since no gaming system that I am aware of can actually create "good roleplay". At the very least, I would say it does not
discourage good roleplay.