Already raised the ticket here: https://feedback.bistudio.com/T179364

I would like to update this.
I've had a good friend of mine test this further, and it turns out that we can reroute the stages to another area folder and still pack, however for prefixing, settings such as: Ambient, Diffuse, Forced Diffuse, Emissive, Specular and Specular Power, does not get changed and stays their original values.
When unpacking the packed prefixed addon, the settings are saved, but the game just doesn't read those values.
I hope this note helps narrow things down.

You make me sad, Geez. How could you. 😭

I do recall that when I last used the vanilla launcher and it of course generated the Chinese servers first off, but I notice that all the server it was generating and listing were those where the ping was over 200 at least, maybe at a stretch 180.
Some countries would be Singapore, China, Japan etc, but I am based in the UK.
Could one reason be the how the servers are located based of Geography is just straight up broken? I've set ping limiters on but nothing would show up unless I unchecked it.
This of course won't solve the speed of the servers being found, but I feel this is something else that could contribute to the whole problem, if it is not isolated to just myself.