in parties, it happens constantly - it dims for every single person who is using a weaponskill.
I'd like SE to add a toggle for this, but nobody seems to have brought up the mechanic before or how annoying it is, so I don't think it's something the actual community wants. That confuses me. I'm aware there are other important things, for sure, but this is simply irritating in parties.
Perhaps once party play is fixed, it will begin to quickly grate on people how annoying the constant dimming is.