Several missed points
No-one claims the "death of Hadoop", but instead the coming obsolecense of a particular programming paradigm. If you identify Hadoop with MapReduce (which at times you seem to, and at times you don't), then you miss the point of the platform entirely - and, might I add, the blog post of mine that you dismiss as 'superficial debate'.
Large-scale, commodity shared-nothing computing has an enormous future. This is not controversial. But the applications that run on those clusters are still developing, and it would be very near-sighted to imagine that MapReduce represented some kind of end-state on that path.