Look at the 60D and 70D
How many years apart?
Look at the improvement in IQ
what make you think the 7D2 will kick ass?
normally 1 year for entry level, 1.5-2.5 years for mid-range, 1.5-5 years for advanced and professional body. canon 70d is released with a big improvement on auto-focus in liveview. and you think that canon 70d does not kick ass? might be to those who are shooting still like you and i do. but for those who are shooting video, it does.
can you find me any still camera bodies out there that can beat canon 70d on live view focusing? there are none as far as i know. however, as far as for still image, you will not find much of different or gap between 60d, 7d and 70d (note: canon 70d focusing with viewfinder is also pretty fast though... i had a chance to use it one time during photo summit.)
how will 7d2 be improved from 7d, i do not know yet . this camera is designed for sport shooters, so i expect more about focusing and frame rate. image IQ and low light capabilities (most of the time, about half of a stop to a stop better in each release as far as i know. as the way i see it, i tend to judge upgrade IQ and low light on RAW file, not JPEG file.) might be not big improvements.
... just my own thoughts