Got my game to finally update to the proper client version. I’m in FL - not NM - and, while I do have Comcast, I could successfully log in to and play WoW on two of my other PCs. I tried almost everything in this thread (outside of formatting) plus found Game Install Stuck on Initializing - #3 by Angelluus-frostmourne which suggested Steam and/or Disc may cause issues with the game properly updating.
So… what finally did it for me was: Uninstall WoW > Logout and fully exit Bnet > Kill all Steam and Disc processes > Connect to hotspot (not sure if necessary but I wanted to leave Comcast out of it) > Launch and log in to Bnet > Start WoW install.
Note on the above, I was only on the hotspot during the initialization and beginning of the WoW install. I paused the download and switched back over to Comcast as soon as the initialization completed and the game actually started downloading; once it was “playable” I was able to get in to the character select screen. Again, not sure if this was necessary but wanted to leave Comcast out of it (VPN may also work here but dunno).