Adding another mirrors in different world locations wouldn't have any impact on the overall latency, because server location would stay the same. All the latency issues are due to the distance to the server and network issues that happen on the way.
In the end it's the server location that matters, not the gateways that would be in different parts of the world. 2 separate servers wouldn't work together and moving the server to North America would be too drastic change for many players.
I've never seen what good ping looks like.
𝒯𝑜𝑜 𝒷𝓊𝓈𝓎 𝓃𝑜𝓌𝒹𝒶𝓎𝓈
Sorry can't hear you over my 100 ms