[MBAtarga]

Below is from the article. It seems to me if this is a SW fix - their fix could likely be reducing performance via reductions in power draw during these "repeated wide open pedal events."
Not that any Mustang owner would notice a performance degradation.

"On affected vehicles, Direct Current (“DC”) fast charging and repeated wide open pedal events can cause the high voltage battery main contactors to overheat. Overheating may lead to arcing and deformation of the electrical contact surfaces, which can result in a contactor that remains open or a contactor that welds closed. An overheated contactor that opens while driving can result in a loss of motive power, which can increase the risk of an accident."

The good news is that the “recall” will simply consist of a software update. A Ford spokesperson told us that the “Secondary On-Board Diagnostic Control Module and Battery Energy Control Module” will receive updated software to fix the issue. It can even be done remotely, so it sounds like owners may not even have to bring their vehicles in to the dealership if they don’t want to — the updated software is expected to be rolled out over-the-air sometime next month. That said, Ford also says that owners will have the option of having the software installed at the dealer if they so choose.