This is from Yoshida's second ZAM interview. It's not very specific... but it's something.

ZAM: In addition to the party search function coming in Patch 1.20, are there any plans to improve the linkshell system soon?

Yoshida: Improving the linkshell system is our highest priority task after the party search function, so we plan on doing so in patch 1.21. However, it involves a very complex script (which is why we haven’t been able to make improvements yet) so we appreciate your continued patience in the matter!