The parcel shelf is great in that it hides everything in the trunk area, but it often gets in the way when loading up. I finally got the Parcel shelf auto-lift (Evannex, $25; maybe discontinued 2019) and installed it. Basically it attaches a wire between the shelf and the hatch so that as the hatch opens the lid of the parcel shelf rases up.  Very clever.  Took less than 5 minutes to install without tools.

Attachment points.

The Evannex design top connection is a friction fit, and it works ok, but I decided to drill a tiny hole in the plastic and insert a screw to fix it in place.  (Screw is not included in the kit)

Lift screw

The cable is nicely made and neatly folds onto the parcel shelf when closed.