I'm in a similar boat, albeit with a different type of wdh. With mine, I can't get the trailer level. Its pretty close, and I didn't set it up so I am unsure if I can angle the ball back even further, but I think if I did that, my bars would be on too much of an angle. So there is the issue. The only thing I think I can do is buy a different shank, and I really don't want to drop the $150 on it.
I recently added a 2nd friction sway control...not sure that I needed it, but the price was right and it was easy enough to do. What I found was in the end was the most significant factor was actually taking a little more weight off the front, which I think in turn allowed everything to "work better" instead of being so stiff.
For instance:
Started with 2 links left. Towed ok, but didn't feel right. The measurement of the front wells were pretty close to back to unhitched...maybe 1/4 inch high.
Went to 3 links left. I didn't even tow with this setup. The bars looked like that had so much tension on them, it didn't seem right. This was the closest I could get to returning it back to unhitched on the front wells, but it was about 1/8 or so lower..which everything I read said if you can't get it perfect that lower was better than higher. Like I said, I couldn't even tell myself to try it.
Instead of going back to 2 links left, I went to 1 link left. This put the front wells at somewhere between 1/4-1/2 in higher. It seems worse than having 2 links left in theory. But in reality, it towed much better..like night and day difference.
Now again I don't have a dual cam...though I've been considering picking one up. But I guess what I'm saying is sometimes close works. You kinda have to pick a spot and try it and adjust from there. I think if I go with the longer shank I can dial it in even better. But for now, this works.