Update on this. The microphone is not the issue. It must have something to do with the antenna. To recap: I can text and use data as much as I want with absolutely zero issues. Placing a call is next to impossible, and when it does go through, the person on the other line can barely understand me as if the service is bad, however I can hear them just perfectly. This persists whether I have 4-5 bars or 1-2. Often times it will display 4-5, then I try to make a call and shortly thereafter it goes to no service. Again, I can still use data and text with no problem.
I went to the Verizon store yesterday and the rep performed a hard reset, and the phone worked as it should right there in the store. Of course the problem returned when I got home (the store is 45 min away). My plan is to get another (cheap) phone as a substitute and then either take apart my 8x or send it off. The warranty is void due to a crack on the screen it sustained months ago.
I'll be honest, I'm very frustrated with the lay persons general lack of knowledge about the phone, and even the reps. I will likely try an older iPhone as the substitute (I've never had one). We will see where this goes. Been on wp8 since march, crappy Droid before that.