It would be great to be able to select all text layers or all b-roll layers at once and make quick edits to them (e.g., changing all text sizes or adding fades to all). Right now, it seems that each of them has to be edited individually, which is a huge time suck. And, Underlord can't do it because it needs you to be able to select all items in the timeline to do so, which is also a missing capability.