Regarding what you say are American's criticisms of the Acme, I would say that talk is cheap and most of those points are silly on the face of them.
How is the stress on the car any worse than four down towing?
I do hear the 10" tires wear quickly. But you can buy a lot of tires for the price difference of the swivel dollies versus the Acme. I'm told they are a standard boat trailer size, but in a less common heavy load range.
Arguing against LED trailer lights is stupid. They are common as dirt today.
Toad brakes get the same exposure behind the MH, and I have never heard of it being a problem. Brakes live in a nasty environment anyway.
Just reading that nonsense makes me think American is desperate.
I think the original idea was a swiveling dolly. Then someone realized it wasn't necessary because the car's front tires will swivel as needed. And it's a lot simpler, lighter, cheaper dolly that way.
As to the physics of the movements of each, you might be overthinking it. On a swivel dolly, the dolly tires track as needed, and the car swivels so its rear tires can do the same. On the Acme, the same thing happens. In terms of that tracking, the only difference is what is turning, the swivel pan or the car's steering.
A lot of newer cars don't have a steering lock. If you have one of those and you use a swivel dolly, you'll have to rig and un-rig your own steering lock each time you load and unload.
