Are you talking especially about combat? That's the impression I'm getting because of your emphasis on damage dealing.
What party composition do you have in mind? Eg I would assume its easier to build a "social pillar driver" as a bard, sorcerer, wizard or warlock than as a champion fighter.
Sorry, I'm getting confused a bit because the style I mentioned was one for which I think 4e doesn't offer anything, namely, "there aren't any such decisions for the players to make, because eg the GM makes them all by manipulating pacing, outcomes, etc behind the screen, ensuring every PC build gets some spotlight, etc".
If Mearls is saying that 4e supported that style and only that style then I think he's radically confused about the game - I've never seen anyone who likes that style praise 4e, let alone point to 4e as a good fit for it.
If Mearls is saying that 4e didn't support that style, and hence wasn't popular with the large number of RPGers who enjoy that style, then I would agree with him.