AirPods, lack of earphone socket, touch bar on mac, discontinuing jobs's favourite MacBook Air 11" have all been rejected by users by and large disappointing them to the core.
The only saving grace recently was dual camera bokeh in 7+ which apple didn't even anticipate that it would sell more,messing up the inventory management. And as analysed above the dual camera was not even first in industry by apple. Many brands have had that offering prior. And the same bokeh job can be easily done be any good cam app (I am waiting for the brilliantly demoed adobe bokeh app)
4.3D face recognition as its not introduced already. Apple wont risk this.
13. Iris scan(Maybe) as its already introduced by few brands & that Governments like India are pushing phone manufacturers to have it for UID.