with the blue ox is the front of the TV at the same ride height with the trailer hitched up as unhitched? If not get it at the same ride height. that may very well fix the light front end.
I had this same issue with my 2500HD duramax and outback 298RE. similar length and weight. Once I got the hitch adjusted to bring the front end down to unloaded ride height it tows like a dream. Do NOT get lower on the front than unloaded, you'll hit the front bump stops and have a terrible ride. I have the Reese dual cam, but IMHO the first key is to get the unloaded and loaded front ride height equal. then see how it works.