As have I!
Today marks the 101st day that my case has been open. An apple rep finally returned contact with me yesterday just to tell me that Apple is aware of a widespread issue and currently has no culprit or timeline for a fix.
They offered me free stuff (they called it a "good faith gesture") for my phone, but I declined stating that I only wanted the issue to be resolved - nothing more, nothing less. I did ask for one of my three phones which have the issue (in five different vehicles, "Beats" branded products, headsets, etc...) to be swapped for a simless or CDMA model, but that seems to be unavailable at the support or customer relations level, as each rep stated that they would need to escalate the request.
I agree that the issue lies with the Intel modem. I've worked with ten other people at my workplace, four of which have an A1661 (CDMA). All of the individuals using an A1778 (GSM 7) or A1784 (GSM 7 Plus) have the same issue that I do.
Again, toggling LTE is what remedies the situation for me (usually). I think a lot of the CDMA users who are complaining about the issue aren't having the same issue that the GSM users are. It seems that they are mistaking connectivity issues for the skipping issues, which is the real issue here.
I'm afraid that we will not have a resolution prior to my upgrade being available, which concerns me about buying another potentially defective phone in 2017. I have already decided to not buy the AirPods because of the potential for them not to work properly, which I wanted since the day that they were announced. Once users who have no bluetooth experience start using AirPods and have the skipping issue, there will be more complaints. Here's a recent thread on Reddit about just that.