If I want to pickwhip across compositions, I first need to tear off my target comp tab and place it under or next to my source comp tab. Likewise, if I'm trying to target a property, the target must first be untwirled.

Instead it'd be much more useful if we could engage the pickwhip and then while hovering over a tab, hit spacebar to temporarily step into that target comp. Once we let go of the mouse click to commit to a property, the original source comp should return back to the focus.

The same action would untwirl any twirled up properties or layers.