Would love to have two outliners open and one being locked in a specific position using the lock icon that content browsers have. This helps me in cases where I need to link a lot of verse editables to actors, and one outliner has the verse device in view, the other has the actors that I use to select as editables (using the “left arrow” icon next to the editable).
By having a lock icon this workflow will be sped up, and I am sure UE5 will value this feature as well, for other cases.