Brakes Failed problems of the 2008 Buick Enclave

This is the 8th time+ we've had water enter the car through the closed moon roof. Water drips down through the left and right windshield pillars, flows out of the seatbelt tensioners in the 3rd row and through the headliner onto the inside of the windshield. You can hear a wave of water flowing above the headliner,and when woosh it flows when the car dips to one side or the other. There's has to be electrical issues and rust that's being created by this problem. The dealership says the drain is clogged with leafs, from a moon room that's never been opened. This problem is pervasive for this platform (2007-2012/traverse/acadia/outlook/enclave) but I don't see any activity from this organization to address this. The last 2 times this happened braking system failed. Warning on the dic: break assist off and then the red critical failure warning and tones came on while driving. So now I have water on the inside of the windshield and failure of the braking system, while I'm driving. The dealership was unable to pull any error codes, but I recorded the event on my cell phone. Now this is a ntsb issue. Failed brakes and not being able to see out the windshield is a real accident waiting to happen. (note, once the vehicle dried out, the brake failure warning and tones went away. ) good thing we live in drought stricken California or we'd probably be dead a long time ago.