My opinion... Return the laptop and get one without this problematic wireless card. Clearly Intel isn't anywhere near fixing the issue or else we would have seen some improvement instead of continual baby steps of progression followed by regressions. I returned my laptop with a 7260 that was severely crippling my ability to work, as this was my work laptop. Dell gave me a slight bit of a push back but in the end they owned up to ensuring I would get a comparable system that fit my needs since the wireless stability of my last one with the 7260 was anything but (ATTN Intel, take notes to this kind of service). I just referred them to the countless issues well documented with this chip and reminded them that they A) chose to put this chip in the laptop and B) didn't offer any alternative chips of different model to switch out, hence the system swap.
Just my 2c. In the end I need a system that works. The 7260... Didn't work.