The new symbols flow assumes that you will never have a need to measure the distance between a layer within one symbol to a layer within another symbol.

Want to quickly use the eyedropper to match a color from another layer? Oh shit.... the layer is in a symbol and now I'm on the symbols page... back to the original page..... copy the artboard (because that's the workaround they suggested on twitter for editing in context)... back to symbols page.... paste the artboard beside the symbol... eyedrop the color... jump out the window.