Ether is weave.
And a mind emanates a weave, an aura of influence.
I thought you didn't want psionics to just be more weave, or was that someone else.
Do you really want an other Wizard that does anything and everything?
Why would a pyromancer be able to do everything? (Or do you want each flavor of primal or not to get everything under those umbrellas?).
Dividing psi into two power sources allows for a better thematic organization.
Emphasize that the primal power source is mind magic. The pyromancer is mental.
Why should druids and barbarians (or whatever else is primal) be mental? Or are you stealing the hope of making them 4e-esque primal? Or did you want it to be that part of mind magic was primal, and not that primal is part of mind magic?
And this is also true for primal Druid, and why different from Cleric.
The substances and motions somewhat correspond, and in the IChing, tree relates to air in the sense of gas expanding and encompassing.
ether (gravity) ~ soil (space, no motion)
earth (solid) ~ metal (contraction)
air (gas) ~ tree (expansion)
water (liquid) ~ water (descension)
fire (plasma) ~ fire (ascension)
It feels like you are trying to force to disparate things from different cultures together. Is that akin to those who try to make all world religions work like D&D gods and goddesses?