What I greatly prefer about the 5e approach is that it tends to skew towards the original design philosophy for D&D, which saw incompleteness as a virtue. Gygax made no bones about this: D&D (and even AD&D, though he was inconsistent about the latter) was what the players, and primarily the DMs, made of it. Whereas 4e is much more constrained.
To use an analogy, to me, 5e feels like a really big box of random lego. I can buy lego kits (adventures) to help me make things, or I can just have at it. 4e felt like one of those kits where you are really expected to follow the directions.
Which makes sense, because it was inspired by the design space of computer-based RPGs, which are necessarily limited in scope.