Imaro
Legend
I don't think I'm getting your point around psionics... There is an entire continent along with a mythos for psionics in Eberron. I'm not sure why that would be considered shifted off to the side... its integrated into the setting.Psionics is still shifted off to the side. It doesn't feel like just another leg on the table to me. Eberron more or less does the "Sarlona is the Psionic continent so the table is as Psionic as many times Sarlona things appear.
Eberron being decades old now also proves my point.
As for Eberron being old... why does that matter if it achieves the goals you are looking for? Otherwise you're just reinventing the wheel.