To be honest, I think this is a problem that needs a better solution and given your willingness to listen and make appropriate changes, I have no doubt you will.
In the years 2017/2018 and for a bike is being marketed as one only for electronic shifting (DI2, etap etc.), it should be functional and aesthetically pleasing for all such shifters. Are there solutions that could be rigged using etap with the current set up--sure...but none that are any more appealing (and perhaps less appealing) than a frame that doesn't market itself as built for electronic shifting and those don't all allow for complete cable integration. I don't know if there is a way to functionally make the cavity near the stem/aero bars big enough to house a blip box and keep cables hidden, but that would probably seem to be the ideal location.
In the years 2017/2018 and for a bike is being marketed as one only for electronic shifting (DI2, etap etc.), it should be functional and aesthetically pleasing for all such shifters. Are there solutions that could be rigged using etap with the current set up--sure...but none that are any more appealing (and perhaps less appealing) than a frame that doesn't market itself as built for electronic shifting and those don't all allow for complete cable integration. I don't know if there is a way to functionally make the cavity near the stem/aero bars big enough to house a blip box and keep cables hidden, but that would probably seem to be the ideal location.