Well, the lack of robust weapon options doesn't help, though I'm not sure that's the cause. There's not much reason to use a greataxe over a greatsword, characters aren't forced into small groups where reach weapons would be ideal (and in fact, most groups scatter to avoid "fireball formation", which limits the usefulness of, say, Paladin auras).
Thrown weapons are terrible again (I miss 4e's "instant return" feature for magic weapons), plus switching to a backup missile weapon can be a hassle, so I see a lot of melee guys without ranged options.
Would the game be better if we had mordenkrads, craghammers, mercurial greatswords, and the like back for melee to use?