What is funny is that my personal server is not having any issues at all. I run the server in the background on my laptop and "remote" into it using my own public IP through a port forward I set up in my router, so network performance should be an issue there too. Yet I get no problems running the game, it is working just fine. I've updated both my server and my client with the hotfix, as soon as it was released, and there is no problem as far as I can tell (FPS seems to be mostly stable and ping remains in acceptable levels at all times).
Of course, my personal server is only intended for private use, and can only support a very limited number of players (I've currently set it to 5 clients to accomodate my faction mate and a few guests, if need be) since it is not running on server-dedicated hardware.