In my case i'm actually using in the opposite way, I turn it on when I feel it is somehow merited ^^ But anyways I like the concept, but I think they could've perhaps made it a tad bit smoother. Still though, I'm sure it'll have its place for me as well, just not in ever shot I take. However it's really easy and quick to turn on and off in the camera app so.I don't have a 6S (waiting for the 7), but the thing I like about live pictures is that you don't have to think about turning it on. You just take pictures. If you get a picture of your kid catching the winning pass of the game, or making an adorable face, you often don't get an opportunity to take it again to capture the motion. All I need is an easy way to strip the motion part out of a picture that doesn't benefit from it.
then i doubt your "photography background" because the image quality is overall much worse than on the 5s. dont let yourself fool by apples marketing blah.
and seriously, no way that a DSLR is anything near the image quality of the 6s.
If you're saying the 6S has WORSE quality than the 5S you're delusional, and I _AM_ a photographer who does it for a living.
However you're certainly correct in that a dSLR is still vastly superior to any smartphone camera, but that still doesn't mean you can't take splendid photos with it.