My take on this whole fiasco.
Its not about battery defect.
Yearly release of high end smartphone already becoming predictable, and knowing this year is not "S" release for iPhone (which means its going to be a major release), Samsung marketing team want to pre-empt the funfair with another major release of its own. So they pushed the engineering team to move Note 7 release forward, shorten testing period to meet the new dateline. Obviously something will be going wrong here (watch The Martian for this).
When its started to explode one by one, they started the investigation. and since ip7 is still not released worldwide they took easy way to solve this. Battery malfunctioning of course. And who else to blame easier rather than their own subsidiary, SDI. Its easier to blame their own subsidiary rather than third party supplier.
It's turned out its not battery issue or else the replacement phone shouldnt be exploding as well. The problem might be deeper than that, maybe design failure on other components inside the phone. And its too costly to re-debug the whole components inside the phone looking for the real cause, plus the reputation already dented. Hens they simply terminate it.
What I can see from here the one to blame is the marketing ppl or the top management, not the engineering team. Good thing is the next flagship release from Samsung will be way better to make up for this. Bad thing? How they going to deal with third party accessories companies like Spigen to make up for their loss, not to mentioned customers that already invested into it.
Sorry for my bad grammar etc., this is my personal assumption and opinion.
Well said..
Its the management fault.. They are rushing for release of note 7.. Didn't do deep testing.. Simply do fast to counter / beat IP7 official release..