I had honestly never heard of a WDH and just had to hit up google to see what you were talking about. Can't say I fully understand how those work but they appear to combat the sagging issue. That said, I have hauled at least 30 different vehicles on this trailer and a deckover before that and never had any issue to speak of. Mostly used our 2011 suburban z71 and it sagged way worse than this new rig. Also never had a trailer brake controller either. Never an issue with braking, stopping or swaying in 10+ years (knock on wood). I have extreme confidence in my towing abilities/situational awareness but I may upgrade this new rig to at least have a brake controller installed.