Couple of observations from playing around with the Queen Breaker LFR.
1. Queen Breaker precision final blows on Queen Breaker blinded enemies does not activate the Spark of Brilliance fragment effect
2. Queen Breaker blinding effect is not considered an "Arc Debuff" for the seasonal mod Trace Evidence
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Likely using the old blinding effect that can also be applied from arc/void/solar grenade launchers. Since it's an arc exotic, it will probably get a rework in the future to use the new Arc 3.0 blinding debuff instead.