You know, that is a really good idea.
On one hand, psi-powers should be difficult to learn and require a lot of specialization.
And this is reflected in the skill costs; not by making everything another skill.
OTOH, some of it has a feel of being repetitive.
Many powers are similar, so should at least be in the same CAT.
And for that matter...wasn't there a rad shield, light shield, heat shield, etc?
The feel of the game would suggest a shield for every crit table... but these always felt really cumbersome to me.