Step back and look at SE's track record with new content. Look at Diadem and how much they hyped it up, only for it to turn into quite possibly the biggest flop of Heavensward. Honestly I'm expecting very little from Eureka, it just smells to me like Diadem 2.0.
The game is extremely stale. The only changes worth looking at come at expansion transitions, then they just fall right back into that same hallway of content they repaint every few months.