As a fencer watching these, I've never felt like I've not known where the blades are. Just from the hand positions and knowing what people do. So I find the constant lights a little distracting.

But I can imagine non-fencers don't have that sense.

What I would like is clarity of when blades meet; this is crucial when determing who scores in foil and sabre and it's often muddied or lost during recordings.