Oh man, that’s a shame - but I guess these things happen, especially under such tight time constraints! Makes sense now if you were taller and could see over the edge, but also, I imagine a sort of glass bottom of the airship might work too and quite friendly on performance. The camera & screen idea would be fine, however I imagine adding a camera and rendering the whole world underneath again would be a critical hit on performance on the quest.
Still, throwing babies off the edge of an airship is just inherently funny - so kudos for that :)