From what I seen of RAW, it does remove the softness.
But, calling this unsubstantial is nonsense.
What your asking requires a bigger sensor (thus thicker phone to fit optics) or you won't really get a more detailed picture, just one with more megapixels).
Fair comment as I'm only looking at samples I've seen - I have not shot with an iPhone 7 yet.
However, what I have seen, just casually, doesn't seem to indicate the camera is substantially better than the previous ones.
I understand that megapixels are not the whole deal, but megapixels have been going up as the phones get slimmer, or in the the case of the 6 form-factor maintaining the same thickness while increasing the MP count, albeit only 4MP which is not a dramatic increase.
I revisited Austin Mann's video for the iPhone 6 and in some ways it may has well serve as an example of the iPhone 7 in terms of what it actually shows http://austinmann.com/trek/iphone-6-plus-camera-review-iceland
He has also just done a video on the iPhone 7 and did one on the 6S last year.
The 4K and 12MP camera on the 6S was an 'improvement' over the 6 but put all three cameras from the 6, 6S and 7 in a head-to-head photo shoot-out and I would say you'd get a reasonably negligible difference in terms of parting with your money to upgrade.
Just a personal opinion on what I've seen - I'd like to be wrong when it comes to the 7
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