I think the part that you're missing is that there isn't another update. When you bought the Surface Pro 3 there were drivers installed. It is the original drivers that seem to work. The updated drivers from some 6/19 update are causing the issue. The whole purpose of going through that exercise was to get rid of the 'updated' drivers and revert back to the old. They've obviously coded something wrong with their new drivers, as they don't work. The Microsoft tech told me it is likely due to the wireless driver getting incorrect information from the power drivers.
I'm hoping that at some point you will see another update (post 6/19) which will actually work. I'm not sure how else I can explain. I've tried to provide as much detail as possible. Again, I've reverted back to the original drivers that came with the device and it is working fine. You won't see updated drivers in the Windows Update until they post updated drivers. Who knows when that will be....