A bit negative...
...is my opinion of the article! Not so good, Vulture central!
At least now we have, for the first time ever, a first stage that successfully boosted a delivery to it's intended orbit, and got it back in one piece, able to analyse exactly what happens to the engines! And if it becomes obvious from that analysis that the engines are not really reusable right now, we at least get to learn how to build them better to make them properly reusable...
Nobody has ever done that before, so it's hats off to SpaceX!