If the tunnels intention was to throw everything out, why didn’t it end at the bottom of Cloud City? Why was it necessary to have another tunnel in the wall that opens conditionally? We don’t even know what triggered the hatch to open, was it Luke’s weight or was it just bad timing (just like it was bad timing that the trash compactor starts with our heros inside)?
A lot of discussion to skirt around the obvious: That Maz having Luke’s original lightsaber is silly.