2014 GMC Acadia lighting problems

Two separate warranty claims. Dealer did replace all tail light assemblies- once on normal warranty claim, the second incident (lhs only) on customer satisfaction basis. Issue> rear tail light lens clouds up with condensation / water to the point that stop light visibility is affected. Approx 50% of the lens is covered internally with water droplets and condensation potentially violating fmvss safety standard for visibility. Apparently the lamp assembly is not sealed and permits water intrusion.

Headlight illumination is limited and prevents driver's ability to see upcoming road conditions, curves, elevation, animals or humans in the road and hazards. Without turning on the high beams. There is a distinct cut off of light at the top of the area illuminated that is not commonly seen in other vehicles and this limits how far ahead you are able to see.