I second this.
It’s frustrating that I have to assign all the individual roles for audio component of each clip I put into the timeline.
I puzzled a bit with this and came up with a workaround, that I thought would work – but doesnt:
1: Select all of your clips in the Event that have the same audio configuration, and to which you want to apply the same roles to each audio component.
2: Go to the inspector -> Audio and double click the title of each of the tracks, and rename them. You will be allowed to batch change each audio components name.
3: Put this into the timeline.
Now this is where it all goes bad:
4: Search for any of the words you’ve applied to the audio components via the timeline index. Problem is. when you select a search results, FCPX selects the entire clip, not the actual audio component, defeating the purpose. If I got the select the actual audio component, I would just assign the necessary role(s).
If you stumble onto this thread, please consider telling Apple about your need: https://www.apple.com/feedback/finalcutpro.html