The game will never catch up to KR, and it doesn't need to. FFXIV has servers in China and they stay a consistent patch behind, and there's not a single issue with it. I personally blame the KR streamers for making NA/EU players feel like they're inferior, but it's very easy ...
In patch 4.3, players can form cross-world linkshells of up to 64 players from different worlds on the same data center. 3) You must travel to my home world/server. Or if you message me your home world, I will come to you.