Single Status Update
I duplicated my EU dir to NA to see if it was possibly to just patch on top of it.
It downloaded 2.2gb (starting tiers) followed by 4.7gb. Which corresponds to a full download.
So I guess overwriting it and patching doesn't work anymore, unlike some year ago.
And the next step would be editing the localization files, which is exactly what your server-picker-launcher-things do.
I'm guessing this is less of a problem for you Social since you have internet. More of an issue for you Rexxie since you have two cups on a string.