Sweep FX alert by flashing light

When te Sweep FX knob is rotated from central position (e.g. all left or all right), it would be good if A or B lights on the related buttons change to flashing light, because the sweep fx is not passed to cue channel, and in dark ambience the sweep knob mark is not visible, so there is the risk that the deck is muted and the crossfader pass to it. What do you think?