EZ suck or cheapo WD setups are a joke. I am using a Reese Dual Cam WD/Anti-Sway setup with 800lb trunnion style bars. I do feel it is a better setup, and you will need to invest in a better setup if you want better performance.
I've got some numbers to show how easy it is to dial in properly your WD setup and distribute. The scales tell the truth. Stop posting and go get some numbers. Your nose being height probably means to much load on the trailer and you need to tilt the hitch head towards the tow vehicle.
First pass, just the truck loaded with all of us and some gear.
Steer: 4620 .lbs
Drive: 3740 .lbs
Gross: 8360 .lbs
Second pass, truck and Airstream but no weight distribution applied.
Steer: 4180 .lbs
Drive: 5140 .lbs
Trailer: 6780 .lbs
Gross: 16100 .lbs
So tongue weight is 960 lbs. Not bad.
Third pass, truck + Airstream with weight distribution applied
Steer: 4580 lbs.
Drive: 4620 lbs.
Trailer: 6900 lbs.
Gross: 16100 lbs.
Damn near perfect FALR. (Forward Axle Load Return) You'll notice that with the WD not applied the front weighs less than the trail unhitched. And with the WD applied, it's almost what it was unhitched. And the weight on the back axle is reduced, with some load spread between and some sent back to the Airstream.
Everything is within the axle and tire ratings along with Gross Combined ratings for the truck.
As for hitch height, you need to make sure that is dialed in correctly too. Guys add Airbags and stuff before ever setting up their hitch properly. I'm using a 5 3/4 inch drop and I am not nose high:
http://www.etrailer.com/Accessories-and-Parts/Reese/RP54977.html
So you need to dial in as close as possible first, with proper weights to tell you what's going on. If it's still high, then you can consider a new shank. Don't rush out and buy a 8 inch drop when your load might still be unbalanced.
On Level Surface:
Unhitch and take measurements at the front and rear wheel wells. Measured the hitch height to the inside top of the ball receiver of the trailer, then measured the height to the top of the ball of the truck. You then add 1/8" per 100 lbs of tongue weight to the ball height needed on the truck.
Hitch should be an inch higher than the trailer, but it might be higher.