Right now, it appears the only options are the default glow FX on the instigator Agent and a Confetti VFX on the item scored. For our current use case, we really need to turn these VFX off, but there is no OFF option, nor does there appear to be a checkbox on the Capture Area Device (like comparable devices with volumes) to disable activation VFX.
Ideally, the CAD would ultimately be able to accomodate using a custom Niagara system so us creators could author our own VFX to fire upon scoring, and this would also solve for our specific need.