Lippert's
Sway Command™ Tow Control Technology press release states:
"
It’s not complicated, it works in conjunction with mechanical sway control equipment, and we were able to take it to market at a very affordable price point.
"
and
"
LCI VP of Electronics Rob Ford explained that Sway Command, coupled with a good weight distribution hitch system, can greatly reduce trailer sway during emergency maneuvers to avoid traffic accidents or other road obstructions. “Using a weight distribution hitch with sway control bars will handle minor sway events, but that alone isn’t enough to handle extreme sway events that can send the trailer into a potentially dangerous situation,” said Ford. “These systems may give drivers a false sense of security, causing them to overcompensate when an extreme sway event occurs and make the situation even worse. Sway Command helps drivers by sensing a sway event before they can, operating the trailer brakes to deter a potentially dangerous situation.”
"
It sounds to me as though Lippert does intend for Sway Command to be used with a WDP plus sway bars (or integrated sway control).
I do not imagine that "overheated" trailer brakes would be a problem.
The mechanical sway control system should be able to damp any frequent small-amplitude yaw excursions.
This
Lippert Video indicates, to me, that the Sway Command is programmed to respond to yaw excursions which are outside the effective zone of the WDH/SC.
Since the Sway Command uses differential (left/right) braking (as opposed to the brute force method of using the manual control on the brake controller), it should be able to provide adequate sway control with relatively low levels of braking force.
I think it is unlikely that yaw excursions which cannot be damped by the WDH/SC would occur over long enough duration to cause brake overheating.
If they do, you need to find the cause(s) of the sway (low tongue weight, bad tire pressure, axle alignment, etc.) and eliminate it(them) ASAP.
No sway control system should be expected to compensate for a poor setup.
Ron