I have a '13 Cx5 so no confirmation about it blocking the camera, you should expect any 2 tray bike rack to block it. If the camera is high on the hatch it may not be a problem.
I've run various Yakima trays, currently a Dr Tray, you'll need to lower the rack to open the hatch. The hatch would probably clear a single tray. I can open the hatch w/o lowering the rack when I have 1 bike loaded in the outer tray. Handlebar just clears (fat bike w wide bars).