I noticed virtually no difference in handling, bouncing, weight, or anything, with a 2-station bike rack mounted to my trailer recently:
Bigger heavier tow vehicle

I was also using my 3 bike rack that fits the TJ with the 35 on the back, so it sticks out a little further. I picked up a 2 bike rack now for the WRX (comes a a 1 1/4 and 2" adapter) It worked a lot better.
That was on my trip out here. Without the bikes it was just barely balanced and I think that put it over the edge. The trailer is now back to behaving after swapping the pintle mounts so the nose points down a little better now.
To the OP: That picture is probably about 3000 miles into a 3200 mile trip across country. As you can see everything is still ok. I'll even be riding that cannondale home today.
FWIW.. The Yakima instructions online warn against using them on trailers, campers, and motor homes. My guess is that they don't want to be responsible for a messed up hitch or it coming in contact with something. They also don't recommend using them offroad.
Now that mine is finally adjusted well I don't mind using it. Just need to brace the receiver a bit.