Simpler I would agree on. More coherent I'm less sure, unless you're meaning to point to (and put pressure on) the disconnect in 4e between combat and non-combat (skill challenge) resolution - because I agree that this is one of the weaker parts of 4e.Tthe idea that the Cortex approach, while emphasizing metagame elements, is simpler and more coherent is important
But 4e also has trad wargame-y elements - like positioning in combat, for instance, as a distinct mechanical dimension rather than just another element of the narrative - which are pretty fun if you're into that sort of thing. It's not incoherent to combine these trad elements with "modern" design, I don't think.