I know the CX motor gives a bit more but, whilst I'm still perusing the various 2016 line-ups, I'm not seeing any compelling reason to upgrade my 2015 Cube.
Mine is full suspension and excellent spec with XX1 this and XT that, but still comes in at a relatively hefty 21kg. I thought the 2016 line-ups would see a material drop in weight but I'm obviously ignoring the laws of physics... and ignoring the 17kg Haibike FullCarbon Ultimate at £12,000.
Similar bikes with similar components at a similar weight; the motor alone isn't enough for me to warrant an upgrade from what I've seen thus far.
A 500Wh battery would always be nice though...