Shatterproof screen. A screen that needs a screen to protect it -- is under-engineered.
Tough metal case. A case that needs a case to protect it -- is under-engineered.
Removable battery. Removable back covers that serve no purpose but decoration -- help mask this serious shortcoming in functionality.
SD slot. Thanks for adding it to the 2015 model.
2013 smaller AMOLED screen. Many good reasons for it, especially ergonomic efficiency and battery life. Tablets already exist to serve the needs for big yet portable screens. If necessary, sell two versions: a phablet and a compact.
Dual front speakers. Thanks for putting them on the 2015 model.
Camera with 3-axis OIS. Put a real camera on it, not yet another "new and improved" Facebook selfie-makers for teenage girls. 4HD/UHD, ultraslow movies, and other gee-whiz special effects -- merely mask this serious shortcoming in functionality.
Except for the top two, almost every premium phone out there is going to use the latest Snapdragon SoC. Moto will lose its technical advantages. Unless Lenovo seriously adds value to the Moto, the brand will never compete with the top two.