I assume you mean moving the sliders whilst playing back and hearing the changes in situ. Not sure if this is technically possible at this stage but added to wishlist for now.
I think this is invalid, that is exactly how it should work. You add effects, press play and then move the sliders and it should work. Bear in mind that some effect settings are very subtle - try adding a Chorus and moving the sliders and you should hear it change.
I assume you mean moving the sliders whilst playing back and hearing the changes in situ. Not sure if this is technically possible at this stage but added to wishlist for now.