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So what has changed since Darwin to warrant this discussion or, more specifically, what has to be added or refined? In short, the paraphrase of the "survival of the fittest" must be enlarged to the "survival of the fittest of the luckiest". Evolution as such has no ultimate goal. It has only temporary goals, as long as we see the universe as a changing place.
Taking as an example our home planet, the Earth, it seemed for billions of years, from some 3.8 billion of years ago (when the bombardment in the Solar System lowered to its nowaday level) to some 800 million years ago, a suitable place for micro-organisms to fill every niche available to them. At some places there most probably was some cooperation between some micro-organisms that was nearly or exactly like multi-cellular life.
Comment: Although there are good reasons to question the established theory of evolution the way it is described in this article (like the story of human migration out of Africa, for example), the reality of the situation is, that evolution on this planet, exposed to a periodic bombardment from space, was indeed marked by the survival of the fittest of the luckiest. And it looks like it might happen again...and rather soon.