I've been wanting to hear HN's opinion on this ever since I heard about it, yet the whole topic is strangely missing from the front page. Kinda reminds me of the video, as soon as it blows up they just cut the audio feed.
Anyway, I think SpaceX's engineers are extremely under pressure right now. These missions are extremely risky, everybody knows how difficult is this field and I personally believe that the amount of pressure the team is facing, it's consistently increasing the potential risk of a failure.
SpaceX is a private company and, like all the other private companies in the earth, it has the goal to make money and make investors happy. Every single failure of the company is a big hit on the brand and a loss of millions and millions of dollars, this put the team under an excessive amount of pressure.