The VOIDRUNNER'S CODEX is coming! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
but the errata does give the option (which was suppossed to be in the PsiHb) that special abilities should be 3x/day ... and did say that if a creature was to be a PC then the 3x/day should be enforced.
... goes for attk/defense modes too. You can swap attk mode uses for other attk modes and same for defense.