Yes, all they have done so far is a *#*#72786#*#* and a refresh on their side. I was debating taking it into the store to see what they could do, but honestly I doubt there is much that can be done other than roll back to 4.2, and I can do that myself. My only option really is to move on to custom roms (I've had many rooted phones over the years, but I went to the GNex for the stock experience and the hope they would update quickly (ha!).
I'm not really interesting in moving to a different device, and my contract is up next June so I'm just waiting that out so I can move carriers if the 4G rollout doesn't get any better in Louisville.