As someone that has designed, engineered, constructed, and operated FTTH deployments I am not surprised by this development at all. Just from reading the press releases and the associated documents it was clear that Google was not employing people with the necessary experience to pull it off. The time-frames that were in those releases were not fiscally feasible.
This particular issue is almost laughable in its incompetence. The only companies that are putting fiber optics in the power space of aerial power lines are power companies for a reason. It is prohibitively expensive labor wise and it is extremely difficult to get a power company to allow ANYONE that is not employed by them to work in this space. The liability issues alone are enough to cause this idea to be a non-starter.
It really isn't hard to do this properly, but the first step is to get yourself a copy of the NESC and actually read it.