Oneplus was quick out of the gate with the One, and then just as quick to fail with the 2 and X.
No better (or worse!) battery lives, no NFC (which I use on my Nexus 5 daily), no SD slot because... Apple did it too? I hear a lot of people say NFC was to save money. OK, so they saved money not including a $3 chip and antenna, but but a fancy aluminum frame on it. Makes sense.
Seriously, all I was looking for in the Two was a longer battery life than my wife's One, and hopefully an SD card slot. Instead they lost a feature I use constantly, the chance to extend battery life, and a sale.