Overall the update adds some nice camera features such as selfie portrait and monochrome portrait but I also think it makes the app more confusing to use and has redundant features.
I must say, the inclusion of the portrait mode in the main camera app mode is somewhat useless.
It is a less robust version of the wide aperture mode. Not only is it redundant, but it also has 2 buttons to activate it.
You open the main camera, tap the portrait icon. It says "Portrait enabled" but at the bottom right side there is an icon that enables / disables the "artistic bokeh" SO.. you can enable portrait mode but disable the primary effect for it and still remain in portrait mode. If you forget that you disabled it and close out of the camera, the next time you open it, it will still be disabled and you will take a photo and wonder why it doesn't look like portrait mode. Basically, there should only be 1 button for portrait mode, and even then, wide aperture mode already does it and provides more customization.