Can you shave the back of the drywall thinner where the clips go?
Great question, would probably have to contact the manufacturer or look at the spec sheet to find out.If you have a double layer of 5/8 Sheetrock isn't that a fire rated ceiling? Can you install those types of fixtures in a fire rated ceiling?
In that case, you can probably enlarge the slight gap between layers and hang the light on only the lower layer.The double layer isn't for fire rating.
It's because they have popcorn ceiling texture so they'll put another layer just to avoid dealing with the texture.