Yoshi-p has random streams called "Yoshi-p's walk" on Niconico when he feels like it, where he visits a random JP server and plays with people on that server. During tonight's stream, he revealed some back stories and future updates to Eureka.
Eureka's first goal was to reanimate "Right after the launch of an MMO".
Eureka will get an update in patch 4.3x.
The next Eureka area:***** (Word will replace Anemos) will have a few new functions and game play elements added to it. (He hinted at something you can do solo as well)
They are planning a levelsync system so players who started late can catch up (note: Not talking about the levelsync for NMs, but a levelsync you can use anywhere in Eureka)
If they make it too convenient, Eureka will just turn into another/the usual FFXIV, so they will need to find a balance in between.
The next hot fixes (planned for the end of March) will include some improvements to the game play and adjustments to the lock boxes.
The hot fixes coming after the above hot fixes will include adjustments to "identifying Anemos crystals" to make it easier to turn Anemos crytals into inferior crystals.