[...]
14.9*72=1074 Gb/s this is the total memory bandwidth with 72 ddr3 chip. So 1074/192*30=
~168 Mh/s this could be the maximum eth mining performance with 72 ddr3 chips. Everything else is bullshit.

These numbers are correct.
The only interesting factor remaining is power consumption. If it's around 500w AND priced well it could be worth buying but nothing to get overly excited about

168Mh/s @ 500W? There is no point in buying that asic, every 6x 1060 3gb with samsung will give you 140Mh/s @ 460W. Better resale value, not mentioning the warranty...