My Audi has a similar belly pan that uses 1/4 turn plastic cam-lock type fasteners. Various "mechanics" mistook them for screws and used brute force to undo them.
Eventually all were broken. I discovered this when I hit a bump and heard it dragging down the street.
I had all the hardware replaced with OEM and now take it exclusively to my favorite independent Audi shop, even for oil changes.
I think the pan plays an important part of reducing vehicle drag, and is important for proper cooling airflow in the engine compartment. I'd vote to keep it on, with any method that's convenient for you and whoever does your oil changes.