First off JMO but 34'5" is too long for a 1/2 ton. 2nd the dry weight is 6880lbs in the brochure. We all know brochure weights are low. Have you weighed your TT? MY guess is it's 7000lbs as it sits without gear. You could be near 7800=8000lbs loaded. If you have 13% for TW that would be 1040lbs. That's a load on the rear of a 1/2 ton.
Also have you done the measurement thing? Measure the front fender well height unhitched than hitch up w/o the WD and see what the difference is. You need to return the front to as close to the original height as possible.
JMO but the overall length of 34'5" and a loaded weight near 8000lbs coupled with a 1/2 ton is what is causing the the push pull you're experiencing. Not way to get around the fact that the TT weighs more than the truck and is going to move it around. Going to a 3/4 ton will help, but a cheaper alternative and a better idea IMO is to go with one of the premium hitches like the Hensley Arrow or ProPride. @ $2500.00 or so they're expensive. But they will 100% eliminate your push pull feeling. Cheaper than a 3/4 ton and 100% better than throwing money at the 1/2 ton trying to make it like a 3/4 ton. For the money you're spent on the Blue OX, C rated tires and now looking at shocks, you could've bought an HA or PP. BTDT. Going used is even better for those hitches.
Save your money and get an HA or PP or if you really want to get a 3/4 ton truck get it. But you'll pay for it at the pump when not towing.
