Hey all, Just my opinion here. Don't want to step on toes, as I'm sure your engineers know what their doing.
That said, had a look at one of our B2's sitting here, (operate 14 of 'em) couple of my boys and I came to the conclusion that;
1) The scores on the pitch horns and pc link are most likely from the T/R control being slightly out of rig, allowing excess right pedal input so they contact the T/R hub, and,
2) The impact marks on the half shell lam's are most likely caused by the T/R hub spherical laminates being sheared, allowing excess blade flap under high loads w/ right pedal input.
Unfortunately have seen both problems in the past. Good thing they were caught sooner than later. As far as serviceability, the MM says impact marks lass than 5mm can be filed out, more than 5mm requires replacement. Hope this helps
Hawkrx