JS: "Suppose for argument's sake that conscious experiences (whatever they are really)  have causal powers that affect our behavior"

That's giving away the store ("telekinesis"), and that cure is worse than the disease (the explanatory gap).

Causally inexplicable (an epistemic matter) is not the same as "epiphenomenal" (an ontic matter).

Better to call ignorance by its proper name: One just can't explain it (causally) in the otherwise universal way...