My problems eventually came back, regardless of updates. Also, I am not expecting a improvements to the issue with Windows Phone 8.1 since this seems to be a device specific issue, I don't hear about it affecting other phones much if at all.
So I actually got in touch with Verizon Wireless Network support, and it took some doing. The gentleman on the phone did some research and acknowledged that this is a known device issue that Verizon has been working on with HTC (apparently for some time with no resolution). They even have it assigned to a specific technician (wish I could get his name and email). Now I imagine with such little market influence, fixing Windows Phone issues are probably low on their priorities list, but this has been going on for a LONG time, and its frustrating that neither Verizon nor HTC has done anything about it.
So for anyone still having this fun, Verizon knows about it, HTC knows about it. As far as I can tell, they don't care.