I had a Dauntless on my 02 LT and my 05 and also pulled a trailer similar to yours (Bunkhouse)
and several Bushtecs through almost every state in the union.
I never said anything negative regarding either hitch,
only that the "sub frame" is wimpy and that's because it's made out of very thin wall hollow tubing.
Do you remember how the old "airhead" BMW's used to crack the rear subframe if you put a top box on them? It's still the same tubing.
Now take a good look at how the Dauntless hangs down,
with each bump it gets pulled back and then gets pushed forward by the trailer,
(with a heavy trailer you must have felt that?)
what happens when metal gets pulled fore and aft continuously?
The convenience of the remove-able lower hitch half is also the "drawback" (pun intended) of the Dauntless.
With the Bushtec there is no hitch "flexing" but you have the inconvenience of three extra bolts (five if you count the rear cross bars) to remove when changing a tire or changing the transmission fluid.
The ideal hitch would be a Bushtec/Dauntless "hybrid" (a Bush-less)
that pulls from the motor mount and "slips of" like the Dauntless with just a couple of pins.